diff --git a/handlers.py b/handlers.py
index 6e8003b..f5a7a27 100644
--- a/handlers.py
+++ b/handlers.py
@@ -3,6 +3,7 @@
 import os
 
 WATCH_NAMESPACE = os.getenv('WATCH_NAMESPACE')
+all_namespaces = []
 if WATCH_NAMESPACE is not None:
     all_namespaces = WATCH_NAMESPACE.split(',')