diff --git a/src/sugar3/activity/webactivity.py b/src/sugar3/activity/webactivity.py
index 3c45f629..fa112e08 100644
--- a/src/sugar3/activity/webactivity.py
+++ b/src/sugar3/activity/webactivity.py
@@ -20,6 +20,7 @@ import os
 import logging
 
 import gi
+gi.require_version('Gdk', '3.0')
 gi.require_version('Gtk', '3.0')
 gi.require_version('WebKit2', '4.0')