diff --git a/README.rst b/README.rst
index b60fabd..116a9aa 100644
--- a/README.rst
+++ b/README.rst
@@ -8,7 +8,7 @@ Requirement
 
 - Python3
 - PyCairo
-- PyGObject
+- PyGObject (GTK3)
 
 Configuration
 -------------
@@ -68,7 +68,7 @@ and the result:
 .. image:: /images/vertical.png
    :alt: single clock
 
-Same in horizontal arragement:
+Same in horizontal arrangement:
 
 .. code:: yaml
 
diff --git a/worldclock.py b/worldclock.py
index 6554105..d5cbd03 100755
--- a/worldclock.py
+++ b/worldclock.py
@@ -35,8 +35,8 @@ import sys
 import cairo
 import gi
 gi.require_version("Gtk", "3.0")
+from gi.repository import GLib
 from gi.repository import Gtk
-from gi.repository import GObject
 import pytz
 import yaml
 
@@ -191,13 +191,13 @@ class Clocks(Gtk.DrawingArea):
             width = len(row) if len(row) > width else width
             for col_no, conf in enumerate(row):
                 self._clocks.append(Clock(conf, row_no, col_no, self.size,
-                                         self.show_seconds))
+                                          self.show_seconds))
 
         self.width = self.size * width
 
     def run(self):
         self.connect('draw', self._draw)
-        GObject.timeout_add(100, self.on_timeout)
+        GLib.timeout_add(100, self.on_timeout)
         win = Gtk.Window()
         win.set_title('World Clock')
         win.set_resizable(not self.disable_resize)