diff --git a/configure.in b/configure.in
index e2ce16ad7..9f3406e60 100644
--- a/configure.in
+++ b/configure.in
@@ -1,8 +1,8 @@
 AC_PREREQ(2.50)
 
 m4_define([mutter_major_version], [2])
-m4_define([mutter_minor_version], [31])
-m4_define([mutter_micro_version], [5])
+m4_define([mutter_minor_version], [91])
+m4_define([mutter_micro_version], [0])
 
 m4_define([mutter_version],
           [mutter_major_version.mutter_minor_version.mutter_micro_version])