diff --git a/demo/config.py b/demo/config.py
index 774eac4..8a5d90a 100644
--- a/demo/config.py
+++ b/demo/config.py
@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+"Store App settings"
 
 USER_AGENT = "COSCUP-demo"
 AP_CONTENT_TYPE = "application/activity+json"