Let multiple external apps be specified
diff --git a/xos/openstack_observer/event_loop.py b/xos/openstack_observer/event_loop.py
index db7459a..0ac626b 100644
--- a/xos/openstack_observer/event_loop.py
+++ b/xos/openstack_observer/event_loop.py
@@ -32,7 +32,7 @@
 # Load app models
 
 try:
-    app_module_names = Config().observer_applist
+    app_module_names = Config().observer_applist.split(',')
 except AttributeError:
     app_module_names = []