diff --git a/backend.py b/backend.py
index 5f5621e..33ee949 100644
--- a/backend.py
+++ b/backend.py
@@ -31,7 +31,7 @@ class EventEncoder(json.JSONEncoder):
 
 
 def dumps(data):
-    return json.dumps(data, cls=EventEncoder)
+    return json.dumps(data, cls=EventEncoder, sort_keys=True)
 
 
 class HeaderMiddleware: