diff --git a/configure.ac b/configure.ac
index 710d55d..23214f3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -26,7 +26,7 @@ AC_SUBST(LIBEMPATHY_GTK_REVISION)
 
 # Minimal version required
 GLIB_REQUIRED=2.16.0
-GTK_REQUIRED=2.16.0
+GTK_REQUIRED=2.18.0
 GCONF_REQUIRED=1.2.0
 LIBPANELAPPLET_REQUIRED=2.10.0
 TELEPATHY_GLIB_REQUIRED=0.7.35

