diff --git a/komrade/backend/operators.py b/komrade/backend/operators.py
index c98a00b..2297ac5 100644
--- a/komrade/backend/operators.py
+++ b/komrade/backend/operators.py
@@ -66,7 +66,7 @@ class Operator(Keymaker):
         'introduce',
         'post_async',
         'get_updates'
-    ]
+    ]