diff --git a/WINGs/Examples/fontl.c b/WINGs/Examples/fontl.c
index 39cdb1d5..893733f7 100644
--- a/WINGs/Examples/fontl.c
+++ b/WINGs/Examples/fontl.c
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include <stdlib.h>
diff --git a/WINGs/WINGs/WINGs.h b/WINGs/WINGs/WINGs.h
index 5ead0a8f..2619834c 100644
--- a/WINGs/WINGs/WINGs.h
+++ b/WINGs/WINGs/WINGs.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef _WINGS_H_
diff --git a/WINGs/WINGs/WUtil.h b/WINGs/WINGs/WUtil.h
index feff8ae8..4533014e 100644
--- a/WINGs/WINGs/WUtil.h
+++ b/WINGs/WINGs/WUtil.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef _WUTIL_H_
diff --git a/WINGs/data.c b/WINGs/data.c
index f4489099..eb9227bf 100644
--- a/WINGs/data.c
+++ b/WINGs/data.c
@@ -13,10 +13,8 @@
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
- *  MA 02110-1301, USA.
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include <string.h>
diff --git a/WINGs/error.c b/WINGs/error.c
index 739fa5e7..5dfe47ac 100644
--- a/WINGs/error.c
+++ b/WINGs/error.c
@@ -13,10 +13,8 @@
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
- *  MA 02110-1301, USA.
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/WINGs/error.h b/WINGs/error.h
index 341c9091..5a9c5998 100644
--- a/WINGs/error.h
+++ b/WINGs/error.h
@@ -13,8 +13,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WUTIL_ERROR_H
diff --git a/WINGs/findfile.c b/WINGs/findfile.c
index bb2ce7f0..a404693e 100644
--- a/WINGs/findfile.c
+++ b/WINGs/findfile.c
@@ -13,10 +13,8 @@
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
- *  MA 02110-1301, USA.
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/WINGs/memory.c b/WINGs/memory.c
index e05e17a8..c5ee259c 100644
--- a/WINGs/memory.c
+++ b/WINGs/memory.c
@@ -13,10 +13,8 @@
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
- *  MA 02110-1301, USA.
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/WINGs/menuparser.c b/WINGs/menuparser.c
index 6d8411cc..b8884201 100644
--- a/WINGs/menuparser.c
+++ b/WINGs/menuparser.c
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 #include "wconfig.h"
 
diff --git a/WINGs/menuparser.h b/WINGs/menuparser.h
index dbf78f99..305fabe8 100644
--- a/WINGs/menuparser.h
+++ b/WINGs/menuparser.h
@@ -13,8 +13,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef _MENUPARSER_H_INCLUDED
diff --git a/WINGs/menuparser_macros.c b/WINGs/menuparser_macros.c
index 8c12f2de..a1305f2c 100644
--- a/WINGs/menuparser_macros.c
+++ b/WINGs/menuparser_macros.c
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 #include "wconfig.h"
 
diff --git a/WINGs/misc.c b/WINGs/misc.c
index 76cf1f59..6bdf683c 100644
--- a/WINGs/misc.c
+++ b/WINGs/misc.c
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 /* Miscelaneous helper functions */
diff --git a/WINGs/userdefaults.h b/WINGs/userdefaults.h
index 3e4b46bd..e9f3d36b 100644
--- a/WINGs/userdefaults.h
+++ b/WINGs/userdefaults.h
@@ -13,8 +13,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WUTIL_USERDEFAULTS_H
diff --git a/WINGs/wconfig.h b/WINGs/wconfig.h
index 6e5fe1e0..d6673fc4 100644
--- a/WINGs/wconfig.h
+++ b/WINGs/wconfig.h
@@ -13,8 +13,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WINGS_CONFIG_H_
diff --git a/WINGs/wruler.c b/WINGs/wruler.c
index 541b4a68..7dde2548 100644
--- a/WINGs/wruler.c
+++ b/WINGs/wruler.c
@@ -13,10 +13,8 @@
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
- *  MA 02110-1301, USA.
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "WINGsP.h"
diff --git a/WPrefs.app/Appearance.c b/WPrefs.app/Appearance.c
index 01ddc28e..d5290f1b 100644
--- a/WPrefs.app/Appearance.c
+++ b/WPrefs.app/Appearance.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "WPrefs.h"
diff --git a/WPrefs.app/Configurations.c b/WPrefs.app/Configurations.c
index 34b716d2..c367e70a 100644
--- a/WPrefs.app/Configurations.c
+++ b/WPrefs.app/Configurations.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "WPrefs.h"
diff --git a/WPrefs.app/Docks.c b/WPrefs.app/Docks.c
index c83332c8..6265c789 100644
--- a/WPrefs.app/Docks.c
+++ b/WPrefs.app/Docks.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "WPrefs.h"
diff --git a/WPrefs.app/Expert.c b/WPrefs.app/Expert.c
index 21fbcb4a..d93a7a84 100644
--- a/WPrefs.app/Expert.c
+++ b/WPrefs.app/Expert.c
@@ -17,8 +17,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "WPrefs.h"
diff --git a/WPrefs.app/Focus.c b/WPrefs.app/Focus.c
index 04198751..f8b649c1 100644
--- a/WPrefs.app/Focus.c
+++ b/WPrefs.app/Focus.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "WPrefs.h"
diff --git a/WPrefs.app/FontSimple.c b/WPrefs.app/FontSimple.c
index 2147b985..624c7b41 100644
--- a/WPrefs.app/FontSimple.c
+++ b/WPrefs.app/FontSimple.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "WPrefs.h"
diff --git a/WPrefs.app/HotCornerShortcuts.c b/WPrefs.app/HotCornerShortcuts.c
index f2db2c04..16e013c1 100644
--- a/WPrefs.app/HotCornerShortcuts.c
+++ b/WPrefs.app/HotCornerShortcuts.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "WPrefs.h"
diff --git a/WPrefs.app/Icons.c b/WPrefs.app/Icons.c
index 510a437f..deb6c3c3 100644
--- a/WPrefs.app/Icons.c
+++ b/WPrefs.app/Icons.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "WPrefs.h"
diff --git a/WPrefs.app/KeyboardSettings.c b/WPrefs.app/KeyboardSettings.c
index 9c4b94dd..8d8e091f 100644
--- a/WPrefs.app/KeyboardSettings.c
+++ b/WPrefs.app/KeyboardSettings.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "WPrefs.h"
diff --git a/WPrefs.app/KeyboardShortcuts.c b/WPrefs.app/KeyboardShortcuts.c
index 6e327729..32375308 100644
--- a/WPrefs.app/KeyboardShortcuts.c
+++ b/WPrefs.app/KeyboardShortcuts.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "config.h"		/* for HAVE_XCONVERTCASE */
diff --git a/WPrefs.app/Menu.c b/WPrefs.app/Menu.c
index 20b992ce..2006d515 100644
--- a/WPrefs.app/Menu.c
+++ b/WPrefs.app/Menu.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "WPrefs.h"
diff --git a/WPrefs.app/MenuPreferences.c b/WPrefs.app/MenuPreferences.c
index 2ae3b101..cf13ce1f 100644
--- a/WPrefs.app/MenuPreferences.c
+++ b/WPrefs.app/MenuPreferences.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "WPrefs.h"
diff --git a/WPrefs.app/MouseSettings.c b/WPrefs.app/MouseSettings.c
index d15d7a45..d03baf14 100644
--- a/WPrefs.app/MouseSettings.c
+++ b/WPrefs.app/MouseSettings.c
@@ -16,8 +16,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "WPrefs.h"
diff --git a/WPrefs.app/Paths.c b/WPrefs.app/Paths.c
index f48eb484..51a47299 100644
--- a/WPrefs.app/Paths.c
+++ b/WPrefs.app/Paths.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "WPrefs.h"
diff --git a/WPrefs.app/Preferences.c b/WPrefs.app/Preferences.c
index 2fa1e4a8..fcfe45fd 100644
--- a/WPrefs.app/Preferences.c
+++ b/WPrefs.app/Preferences.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "WPrefs.h"
diff --git a/WPrefs.app/TexturePanel.c b/WPrefs.app/TexturePanel.c
index f5863a3b..8b5c79d8 100644
--- a/WPrefs.app/TexturePanel.c
+++ b/WPrefs.app/TexturePanel.c
@@ -16,8 +16,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include <stdio.h>
diff --git a/WPrefs.app/TexturePanel.h b/WPrefs.app/TexturePanel.h
index 05b8a48a..3b1dc6a6 100644
--- a/WPrefs.app/TexturePanel.h
+++ b/WPrefs.app/TexturePanel.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef TEXTUREPANEL_H_
diff --git a/WPrefs.app/Themes.c b/WPrefs.app/Themes.c
index 66ba3113..6ac328a0 100644
--- a/WPrefs.app/Themes.c
+++ b/WPrefs.app/Themes.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "WPrefs.h"
diff --git a/WPrefs.app/WPrefs.c b/WPrefs.app/WPrefs.c
index a34b9e84..0dfe9936 100644
--- a/WPrefs.app/WPrefs.c
+++ b/WPrefs.app/WPrefs.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "config.h"
diff --git a/WPrefs.app/WPrefs.h b/WPrefs.app/WPrefs.h
index 2b0042c4..5b068b09 100644
--- a/WPrefs.app/WPrefs.h
+++ b/WPrefs.app/WPrefs.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WPREFS_H_
diff --git a/WPrefs.app/WindowHandling.c b/WPrefs.app/WindowHandling.c
index 628278ea..44d6599c 100644
--- a/WPrefs.app/WindowHandling.c
+++ b/WPrefs.app/WindowHandling.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "WPrefs.h"
diff --git a/WPrefs.app/Workspace.c b/WPrefs.app/Workspace.c
index e87d6a33..cc8eb98a 100644
--- a/WPrefs.app/Workspace.c
+++ b/WPrefs.app/Workspace.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "WPrefs.h"
diff --git a/WPrefs.app/editmenu.c b/WPrefs.app/editmenu.c
index c84dc08a..195b4c26 100644
--- a/WPrefs.app/editmenu.c
+++ b/WPrefs.app/editmenu.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include <WINGs/WINGsP.h>
diff --git a/WPrefs.app/editmenu.h b/WPrefs.app/editmenu.h
index 1195fe01..19dee0b9 100644
--- a/WPrefs.app/editmenu.h
+++ b/WPrefs.app/editmenu.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 
diff --git a/WPrefs.app/main.c b/WPrefs.app/main.c
index 2a76a203..b37c3d6c 100644
--- a/WPrefs.app/main.c
+++ b/WPrefs.app/main.c
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "config.h"
diff --git a/WPrefs.app/xmodifier.c b/WPrefs.app/xmodifier.c
index d3746ebc..880d8c2e 100644
--- a/WPrefs.app/xmodifier.c
+++ b/WPrefs.app/xmodifier.c
@@ -27,9 +27,8 @@ Perpetrator: Sudish Joseph <sj@eng.mindspring.net>, Sept. 1997. */
  for more details.
 
  You should have received a copy of the GNU General Public License along
- with XEmacs; see the file COPYING. if not, write to the
- Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301 USA. */
+ with XEmacs; see the file COPYING. if not, see
+ <https://www.gnu.org/licenses/>. */
 
 #include <string.h>
 #include <strings.h>
diff --git a/src/GNUstep.h b/src/GNUstep.h
index 38896e18..221e85fc 100644
--- a/src/GNUstep.h
+++ b/src/GNUstep.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 
diff --git a/src/WindowMaker.h b/src/WindowMaker.h
index da727b37..bd24a29f 100644
--- a/src/WindowMaker.h
+++ b/src/WindowMaker.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WINDOWMAKER_H_
diff --git a/src/actions.c b/src/actions.c
index 1205a67f..89a5cd92 100644
--- a/src/actions.c
+++ b/src/actions.c
@@ -17,8 +17,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  along with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/actions.h b/src/actions.h
index f9aa0efc..8a69cac8 100644
--- a/src/actions.h
+++ b/src/actions.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMACTIONS_H_
diff --git a/src/appicon.c b/src/appicon.c
index 10575380..7e127cb9 100644
--- a/src/appicon.c
+++ b/src/appicon.c
@@ -16,8 +16,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/appicon.h b/src/appicon.h
index 44913b81..5507e1f2 100644
--- a/src/appicon.h
+++ b/src/appicon.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 
diff --git a/src/application.c b/src/application.c
index 6ff3d3fc..d076c411 100644
--- a/src/application.c
+++ b/src/application.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 #include "wconfig.h"
 
diff --git a/src/application.h b/src/application.h
index 1a959993..26bec374 100644
--- a/src/application.h
+++ b/src/application.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 
diff --git a/src/appmenu.c b/src/appmenu.c
index bc708964..9b1674e4 100644
--- a/src/appmenu.c
+++ b/src/appmenu.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/appmenu.h b/src/appmenu.h
index cf7b685f..fc269c4d 100644
--- a/src/appmenu.h
+++ b/src/appmenu.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef _WAPPMENU_H_
diff --git a/src/balloon.c b/src/balloon.c
index bc47c38a..94ed8d84 100644
--- a/src/balloon.c
+++ b/src/balloon.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/balloon.h b/src/balloon.h
index 4b0d3875..b61cca1a 100644
--- a/src/balloon.h
+++ b/src/balloon.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef _BALLOON_H_
diff --git a/src/client.c b/src/client.c
index 361566fa..03584646 100644
--- a/src/client.c
+++ b/src/client.c
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 #include "wconfig.h"
 
diff --git a/src/client.h b/src/client.h
index 5758046c..8bef7bcd 100644
--- a/src/client.h
+++ b/src/client.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMCLIENT_H_
diff --git a/src/colormap.c b/src/colormap.c
index 121d33b3..ee231e3f 100644
--- a/src/colormap.c
+++ b/src/colormap.c
@@ -19,8 +19,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/colormap.h b/src/colormap.h
index 0236541d..ab43379a 100644
--- a/src/colormap.h
+++ b/src/colormap.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMCOLORMAP_H
diff --git a/src/cycling.c b/src/cycling.c
index 94b91832..956d562e 100644
--- a/src/cycling.c
+++ b/src/cycling.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/cycling.h b/src/cycling.h
index eb8212b5..bba05d56 100644
--- a/src/cycling.h
+++ b/src/cycling.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMCYCLING_H
diff --git a/src/defaults.c b/src/defaults.c
index 42bc3445..10efdf7e 100644
--- a/src/defaults.c
+++ b/src/defaults.c
@@ -17,8 +17,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/defaults.h b/src/defaults.h
index 492459ba..81d41f3b 100644
--- a/src/defaults.h
+++ b/src/defaults.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMDEFAULTS_H_
diff --git a/src/dialog.c b/src/dialog.c
index 82c20965..bbcd4dcb 100644
--- a/src/dialog.c
+++ b/src/dialog.c
@@ -17,8 +17,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/dialog.h b/src/dialog.h
index c39e2afe..f44d5a53 100644
--- a/src/dialog.h
+++ b/src/dialog.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 
diff --git a/src/dock.c b/src/dock.c
index 35d13b0b..1967e794 100644
--- a/src/dock.c
+++ b/src/dock.c
@@ -17,8 +17,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/dock.h b/src/dock.h
index 7796e934..de4ee983 100644
--- a/src/dock.h
+++ b/src/dock.h
@@ -16,8 +16,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMDOCK_H_
diff --git a/src/dockedapp.c b/src/dockedapp.c
index 75cc16f7..18c33099 100644
--- a/src/dockedapp.c
+++ b/src/dockedapp.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/dockedapp.h b/src/dockedapp.h
index 5f5118b2..02dbe524 100644
--- a/src/dockedapp.h
+++ b/src/dockedapp.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMDOCKEDAPP_H_
diff --git a/src/event.c b/src/event.c
index 93669b1e..ecd1c9ba 100644
--- a/src/event.c
+++ b/src/event.c
@@ -16,8 +16,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/event.h b/src/event.h
index 780f04e0..21c6c1bb 100644
--- a/src/event.h
+++ b/src/event.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMEVENT_H
diff --git a/src/framewin.c b/src/framewin.c
index 721e6be0..f031cade 100644
--- a/src/framewin.c
+++ b/src/framewin.c
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/framewin.h b/src/framewin.h
index 1e034755..9fb5419c 100644
--- a/src/framewin.h
+++ b/src/framewin.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMFRAMEWINDOW_H_
diff --git a/src/geomview.h b/src/geomview.h
index ec135fec..ea650923 100644
--- a/src/geomview.h
+++ b/src/geomview.h
@@ -13,8 +13,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef GEOMVIEW_H
diff --git a/src/icon.c b/src/icon.c
index 9e3c89a4..62820af6 100644
--- a/src/icon.c
+++ b/src/icon.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/icon.h b/src/icon.h
index cccd7a86..117722eb 100644
--- a/src/icon.h
+++ b/src/icon.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 
diff --git a/src/keybind.h b/src/keybind.h
index 25b7aac8..95cc6d3e 100644
--- a/src/keybind.h
+++ b/src/keybind.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMKEYBIND_H
diff --git a/src/keytree.c b/src/keytree.c
index c440e5a8..29f23258 100644
--- a/src/keytree.c
+++ b/src/keytree.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/keytree.h b/src/keytree.h
index fcf223ae..47788687 100644
--- a/src/keytree.h
+++ b/src/keytree.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMKEYTREE_H
diff --git a/src/main.c b/src/main.c
index e382a7be..91d798cf 100644
--- a/src/main.c
+++ b/src/main.c
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/main.h b/src/main.h
index cf61bc4a..573cca1c 100644
--- a/src/main.h
+++ b/src/main.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMMAIN_H_
diff --git a/src/menu.c b/src/menu.c
index 7d3b69db..989ca5ed 100644
--- a/src/menu.c
+++ b/src/menu.c
@@ -16,8 +16,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/menu.h b/src/menu.h
index 036403bd..3305eef8 100644
--- a/src/menu.h
+++ b/src/menu.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMMENU_H_
diff --git a/src/misc.c b/src/misc.c
index 788c1b5d..430b2143 100644
--- a/src/misc.c
+++ b/src/misc.c
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 #include "wconfig.h"
 
diff --git a/src/misc.h b/src/misc.h
index 288a8bb4..5aa545ad 100644
--- a/src/misc.h
+++ b/src/misc.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 #ifndef WMMISC_H_
 #define WMMISC_H_
diff --git a/src/monitor.c b/src/monitor.c
index c784dd3f..184f0296 100644
--- a/src/monitor.c
+++ b/src/monitor.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/monitor.h b/src/monitor.h
index fb9f7f14..a32e2268 100644
--- a/src/monitor.h
+++ b/src/monitor.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMMONITOR_H
diff --git a/src/motif.c b/src/motif.c
index a15d9c30..8acaa389 100644
--- a/src/motif.c
+++ b/src/motif.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/motif.h b/src/motif.h
index 7523e772..f0354dc4 100644
--- a/src/motif.h
+++ b/src/motif.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 
diff --git a/src/moveres.c b/src/moveres.c
index e6653e6c..30d5e27c 100644
--- a/src/moveres.c
+++ b/src/moveres.c
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/osdep.h b/src/osdep.h
index 485995c3..e876139d 100644
--- a/src/osdep.h
+++ b/src/osdep.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMOSDEP_H_
diff --git a/src/pixmap.c b/src/pixmap.c
index 9bb06228..2f883cbf 100644
--- a/src/pixmap.c
+++ b/src/pixmap.c
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/pixmap.h b/src/pixmap.h
index 094bd521..3e573ee0 100644
--- a/src/pixmap.h
+++ b/src/pixmap.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 #ifndef WMPIXMAP_H_
 #define WMPIXMAP_H_
diff --git a/src/placement.c b/src/placement.c
index 29ee6959..9b5a6306 100644
--- a/src/placement.c
+++ b/src/placement.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/placement.h b/src/placement.h
index 37d2441e..4e57fba6 100644
--- a/src/placement.h
+++ b/src/placement.h
@@ -16,8 +16,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef PLACEMENT_H
diff --git a/src/properties.c b/src/properties.c
index d1db0033..33e06b1e 100644
--- a/src/properties.c
+++ b/src/properties.c
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/properties.h b/src/properties.h
index 10c73d2e..62a84b5c 100644
--- a/src/properties.h
+++ b/src/properties.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 
diff --git a/src/randr.c b/src/randr.c
index bacfa4a7..8af9829e 100644
--- a/src/randr.c
+++ b/src/randr.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/randr.h b/src/randr.h
index 4799a43b..866079b2 100644
--- a/src/randr.h
+++ b/src/randr.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef _WMRANDR_H_
diff --git a/src/resources.c b/src/resources.c
index 61ed48a6..acd9083d 100644
--- a/src/resources.c
+++ b/src/resources.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/resources.h b/src/resources.h
index 7fe589f0..469c66ca 100644
--- a/src/resources.h
+++ b/src/resources.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMRESOURCES_H_
diff --git a/src/rootmenu.c b/src/rootmenu.c
index fb42c30f..7313b254 100644
--- a/src/rootmenu.c
+++ b/src/rootmenu.c
@@ -17,8 +17,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/rootmenu.h b/src/rootmenu.h
index 69d0aa70..0b917bcb 100644
--- a/src/rootmenu.h
+++ b/src/rootmenu.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMROOTMENU_H
diff --git a/src/screen.c b/src/screen.c
index ba007cca..73224e61 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/screen.h b/src/screen.h
index 9ecb1253..3dd1a98a 100644
--- a/src/screen.h
+++ b/src/screen.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMSCREEN_H_
diff --git a/src/session.c b/src/session.c
index 9d66b218..13cbbaa6 100644
--- a/src/session.c
+++ b/src/session.c
@@ -16,8 +16,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 /*
diff --git a/src/session.h b/src/session.h
index 4a7b9b4c..8a4b74d6 100644
--- a/src/session.h
+++ b/src/session.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMSESSION_H_
diff --git a/src/shutdown.c b/src/shutdown.c
index 99116678..0263f424 100644
--- a/src/shutdown.c
+++ b/src/shutdown.c
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/shutdown.h b/src/shutdown.h
index bb29b39f..23a28200 100644
--- a/src/shutdown.h
+++ b/src/shutdown.h
@@ -14,9 +14,8 @@
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef SHUTDOWN_H
diff --git a/src/stacking.c b/src/stacking.c
index 240c7b1e..c74b41a7 100644
--- a/src/stacking.c
+++ b/src/stacking.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/stacking.h b/src/stacking.h
index 574ed74b..551e7e98 100644
--- a/src/stacking.h
+++ b/src/stacking.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMSTACKING_H_
diff --git a/src/startup.c b/src/startup.c
index 85830971..9fc9e4cf 100644
--- a/src/startup.c
+++ b/src/startup.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/startup.h b/src/startup.h
index aba3c37d..c07acf45 100644
--- a/src/startup.h
+++ b/src/startup.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMSTARTUP_H
diff --git a/src/superfluous.c b/src/superfluous.c
index 4e30542f..0badf1af 100644
--- a/src/superfluous.c
+++ b/src/superfluous.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/superfluous.h b/src/superfluous.h
index b3424cd5..f9986ab8 100644
--- a/src/superfluous.h
+++ b/src/superfluous.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMSUPERFLUOUS_H
diff --git a/src/switchmenu.c b/src/switchmenu.c
index 0f1746f6..0bfbcebf 100644
--- a/src/switchmenu.c
+++ b/src/switchmenu.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/switchmenu.h b/src/switchmenu.h
index 810286ae..59e4cb38 100644
--- a/src/switchmenu.h
+++ b/src/switchmenu.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMSWITCHMENU_H
diff --git a/src/switchpanel.c b/src/switchpanel.c
index 297ce8df..223d38c2 100644
--- a/src/switchpanel.c
+++ b/src/switchpanel.c
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/switchpanel.h b/src/switchpanel.h
index 2c4e6426..099e4e70 100644
--- a/src/switchpanel.h
+++ b/src/switchpanel.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef _SWITCHPANEL_H_
diff --git a/src/texture.c b/src/texture.c
index e69fe485..0bbc697e 100644
--- a/src/texture.c
+++ b/src/texture.c
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/texture.h b/src/texture.h
index 193c2613..7272c004 100644
--- a/src/texture.h
+++ b/src/texture.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 
diff --git a/src/usermenu.c b/src/usermenu.c
index c5542884..29c49a39 100644
--- a/src/usermenu.c
+++ b/src/usermenu.c
@@ -16,8 +16,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  *
  * * * * * * * * *
  * User defined menu is good, but beer's always better
diff --git a/src/usermenu.h b/src/usermenu.h
index 2a9cde80..6eb7ecf6 100644
--- a/src/usermenu.h
+++ b/src/usermenu.h
@@ -16,8 +16,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifdef USER_MENU
diff --git a/src/wconfig.h.in b/src/wconfig.h.in
index d87cf206..d410a568 100644
--- a/src/wconfig.h.in
+++ b/src/wconfig.h.in
@@ -16,9 +16,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
- *  MA 02110-1301, USA.
+ *  along with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMCONFIG_H_
diff --git a/src/wcore.c b/src/wcore.c
index d04d0932..1d4e4406 100644
--- a/src/wcore.c
+++ b/src/wcore.c
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/wcore.h b/src/wcore.h
index 6065c5fe..a3247ede 100644
--- a/src/wcore.h
+++ b/src/wcore.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 
diff --git a/src/wdefaults.c b/src/wdefaults.c
index 9a3e92c0..63c85a89 100644
--- a/src/wdefaults.c
+++ b/src/wdefaults.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/wdefaults.h b/src/wdefaults.h
index c8cbff59..4f3a73dc 100644
--- a/src/wdefaults.h
+++ b/src/wdefaults.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMWDEFAULTS_H_
diff --git a/src/window.c b/src/window.c
index 857deec8..d93b65ee 100644
--- a/src/window.c
+++ b/src/window.c
@@ -16,8 +16,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/window.h b/src/window.h
index 9ccabdeb..9244cbaa 100644
--- a/src/window.h
+++ b/src/window.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMWINDOW_H_
diff --git a/src/winmenu.c b/src/winmenu.c
index 706378f5..e098be96 100644
--- a/src/winmenu.c
+++ b/src/winmenu.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/winmenu.h b/src/winmenu.h
index f8b6e88d..f14eea4c 100644
--- a/src/winmenu.h
+++ b/src/winmenu.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMWINMENU_H
diff --git a/src/winspector.c b/src/winspector.c
index f95bcdef..4de780de 100644
--- a/src/winspector.c
+++ b/src/winspector.c
@@ -16,8 +16,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/winspector.h b/src/winspector.h
index a9df71a4..a504d605 100644
--- a/src/winspector.h
+++ b/src/winspector.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WINSPECTOR_H_
diff --git a/src/wmspec.c b/src/wmspec.c
index 2d9b4611..d7e5d2bb 100644
--- a/src/wmspec.c
+++ b/src/wmspec.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 /*
diff --git a/src/wmspec.h b/src/wmspec.h
index b0713ef0..a6e3955c 100644
--- a/src/wmspec.h
+++ b/src/wmspec.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 
diff --git a/src/workspace.c b/src/workspace.c
index 640d481d..cbc0bfed 100644
--- a/src/workspace.c
+++ b/src/workspace.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 #include "wconfig.h"
 
diff --git a/src/workspace.h b/src/workspace.h
index 0c93a2fc..ab5849e9 100644
--- a/src/workspace.h
+++ b/src/workspace.h
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMWORKSPACE_H_
diff --git a/src/wsmap.c b/src/wsmap.c
index 6f30e36a..1794c359 100644
--- a/src/wsmap.c
+++ b/src/wsmap.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "wconfig.h"
diff --git a/src/xinerama.c b/src/xinerama.c
index bb7412f9..45f9f6fb 100644
--- a/src/xinerama.c
+++ b/src/xinerama.c
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include <stdlib.h>
diff --git a/src/xinerama.h b/src/xinerama.h
index e606b5a9..88249738 100644
--- a/src/xinerama.h
+++ b/src/xinerama.h
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef _WMXINERAMA_H_
diff --git a/src/xmodifier.c b/src/xmodifier.c
index f4bdd0d0..5641388e 100644
--- a/src/xmodifier.c
+++ b/src/xmodifier.c
@@ -23,9 +23,8 @@ Perpetrator: Sudish Joseph <sj@eng.mindspring.net>, Sept. 1997. */
  for more details.
 
  You should have received a copy of the GNU General Public License along
- with XEmacs; see the file COPYING. if not, write to the
- Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301 USA. */
+ with XEmacs; see the file COPYING. if not, see
+ <https://www.gnu.org/licenses/>. */
 
 #include "wconfig.h"
 
diff --git a/src/xmodifier.h b/src/xmodifier.h
index 915b1137..e7e6a719 100644
--- a/src/xmodifier.h
+++ b/src/xmodifier.h
@@ -13,8 +13,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef _XMODIFIER_H_INCLUDED
diff --git a/src/xutil.c b/src/xutil.c
index 21d3c048..515970fb 100644
--- a/src/xutil.c
+++ b/src/xutil.c
@@ -14,9 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
- *  MA 02110-1301, USA.
+ *  along with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include <X11/Xlib.h>
diff --git a/src/xutil.h b/src/xutil.h
index e44f3793..584e950f 100644
--- a/src/xutil.h
+++ b/src/xutil.h
@@ -13,8 +13,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef _WM_XUTIL_H_
diff --git a/util/convertfonts.c b/util/convertfonts.c
index 1674ced8..08ba503a 100644
--- a/util/convertfonts.c
+++ b/util/convertfonts.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifdef __GLIBC__
diff --git a/util/geticonset.c b/util/geticonset.c
index 4505551c..b6ef2c3f 100644
--- a/util/geticonset.c
+++ b/util/geticonset.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifdef __GLIBC__
diff --git a/util/getstyle.c b/util/getstyle.c
index a2935892..5ebbda17 100644
--- a/util/getstyle.c
+++ b/util/getstyle.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifdef __GLIBC__
diff --git a/util/seticons.c b/util/seticons.c
index 38f210f0..a3685820 100644
--- a/util/seticons.c
+++ b/util/seticons.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifdef __GLIBC__
diff --git a/util/setstyle.c b/util/setstyle.c
index 0883459a..756fc448 100644
--- a/util/setstyle.c
+++ b/util/setstyle.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifdef __GLIBC__
diff --git a/util/wdread.c b/util/wdread.c
index 2351b2dd..fdbe6fcc 100644
--- a/util/wdread.c
+++ b/util/wdread.c
@@ -16,8 +16,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifdef __GLIBC__
diff --git a/util/wdwrite.c b/util/wdwrite.c
index 2ff16706..6a2dd909 100644
--- a/util/wdwrite.c
+++ b/util/wdwrite.c
@@ -15,8 +15,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifdef __GLIBC__
diff --git a/util/wmgenmenu.h b/util/wmgenmenu.h
index ad35927d..28ae16be 100644
--- a/util/wmgenmenu.h
+++ b/util/wmgenmenu.h
@@ -13,8 +13,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 /*
diff --git a/util/wmiv.c b/util/wmiv.c
index c56208e7..19a94019 100755
--- a/util/wmiv.c
+++ b/util/wmiv.c
@@ -14,8 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #if !defined(_GNU_SOURCE)
diff --git a/util/wmmenugen.c b/util/wmmenugen.c
index f1ad830a..a5f34a38 100644
--- a/util/wmmenugen.c
+++ b/util/wmmenugen.c
@@ -14,8 +14,7 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include <sys/types.h>
diff --git a/util/wmmenugen.h b/util/wmmenugen.h
index 1250954a..5413d93a 100644
--- a/util/wmmenugen.h
+++ b/util/wmmenugen.h
@@ -14,8 +14,7 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef WMMENUGEN_H
diff --git a/util/wmmenugen_misc.c b/util/wmmenugen_misc.c
index 161a32e0..b59cfda9 100644
--- a/util/wmmenugen_misc.c
+++ b/util/wmmenugen_misc.c
@@ -16,8 +16,7 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include <libgen.h>
diff --git a/util/wmmenugen_parse_wmconfig.c b/util/wmmenugen_parse_wmconfig.c
index 82ba0103..9e104ff3 100644
--- a/util/wmmenugen_parse_wmconfig.c
+++ b/util/wmmenugen_parse_wmconfig.c
@@ -16,8 +16,7 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include <sys/types.h>
diff --git a/util/wmmenugen_parse_xdg.c b/util/wmmenugen_parse_xdg.c
index 826ce445..90a13cb3 100644
--- a/util/wmmenugen_parse_xdg.c
+++ b/util/wmmenugen_parse_xdg.c
@@ -16,8 +16,7 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 /*
diff --git a/util/wmsetbg.c b/util/wmsetbg.c
index a7e59872..ae66ea1e 100644
--- a/util/wmsetbg.c
+++ b/util/wmsetbg.c
@@ -17,8 +17,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 /*
diff --git a/util/wxcopy.c b/util/wxcopy.c
index 82b4c7f2..97733026 100644
--- a/util/wxcopy.c
+++ b/util/wxcopy.c
@@ -12,10 +12,8 @@
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
- *  MA 02110-1301, USA.
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include <stdio.h>
diff --git a/util/wxpaste.c b/util/wxpaste.c
index 0de98e3a..8b309dec 100644
--- a/util/wxpaste.c
+++ b/util/wxpaste.c
@@ -12,10 +12,8 @@
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
- *  MA 02110-1301, USA.
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "../config.h"