diff --git a/engine/apps/slack/views.py b/engine/apps/slack/views.py
index 1812927a..2c7aff6b 100644
--- a/engine/apps/slack/views.py
+++ b/engine/apps/slack/views.py
@@ -433,8 +433,8 @@ class SlackEventApiEndpointView(APIView):
                             step_was_found = True
 
         if not step_was_found:
-            raise Exception("Step is undefined" + str(payload))
-
+            logger.warning("SlackEventApiEndpointView: Step is undefined" + str(payload))
+            return Response(status=422)
         return Response(status=200)
 
     @staticmethod