diff --git a/configure.ac b/configure.ac
index 245cf2304..3c5b1e5db 100644
--- a/configure.ac
+++ b/configure.ac
@@ -27,7 +27,7 @@ m4_define(glib_configure_ac)
 
 m4_define([glib_major_version], [2])
 m4_define([glib_minor_version], [31])
-m4_define([glib_micro_version], [12])
+m4_define([glib_micro_version], [13])
 m4_define([glib_interface_age], [0])
 m4_define([glib_binary_age],
           [m4_eval(100 * glib_minor_version + glib_micro_version)])