diff --git a/configure.ac b/configure.ac
index 734851ae..3479a4b6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -41,7 +41,7 @@ dnl public release, then set age to 0.
 dnl
 dnl libwraster
 WRASTER_CURRENT=4
-WRASTER_REVISION=0
+WRASTER_REVISION=1
 WRASTER_AGE=1
 WRASTER_VERSION=$WRASTER_CURRENT:$WRASTER_REVISION:$WRASTER_AGE
 AC_SUBST(WRASTER_VERSION)