diff --git a/configure.ac b/configure.ac
index ad494adf93..abca35a3c0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -73,7 +73,7 @@ AC_SUBST(GACUTIL_FLAGS)
 AC_SUBST(LIB_PREFIX)
 AC_SUBST(LIB_SUFFIX)
 
-GTK_SHARP_VERSION=2.99.3
+GTK_SHARP_VERSION=2.99.4
 dnl Check for glib-sharp
 PKG_CHECK_MODULES(GLIB_SHARP, glib-sharp-3.0 >= $GTK_SHARP_VERSION)
 AC_SUBST(GLIB_SHARP_CFLAGS)