diff --git a/configure.ac b/configure.ac
index 032961ef97..116d0eccdb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -12,7 +12,7 @@ AC_PREREQ([2.62])
 
 m4_define([gtk_major_version], [2])
 m4_define([gtk_minor_version], [90])
-m4_define([gtk_micro_version], [3])
+m4_define([gtk_micro_version], [4])
 m4_define([gtk_interface_age], [0])
 m4_define([gtk_binary_age],
           [m4_eval(100 * gtk_minor_version + gtk_micro_version)])