diff --git a/dynamicweb/settings/base.py b/dynamicweb/settings/base.py
index 9dd7cf48..2d51cb14 100644
--- a/dynamicweb/settings/base.py
+++ b/dynamicweb/settings/base.py
@@ -121,6 +121,7 @@ INSTALLED_APPS = (
     'treebeard',  # utilities for implementing a tree
     'sekizai',  # for javascript and css management
     'menus',  # helper for model independent hierarchical website navigation
+    'sortedm2m',
     #TODO:'cmsplugin_filer_image',
 
     # 2nd migrate