diff --git a/github_webhook/webhook.py b/github_webhook/webhook.py
index 4005beb..6486566 100644
--- a/github_webhook/webhook.py
+++ b/github_webhook/webhook.py
@@ -17,7 +17,7 @@ class Webhook(object):
     """
 
     def __init__(self, app, endpoint='/postreceive', secret=None):
-        app.add_url_rule(endpoint, view_func=self._postreceive,
+        app.add_url_rule(rule=endpoint, endpoint=endpoint, view_func=self._postreceive,
                          methods=['POST'])
 
         self._hooks = collections.defaultdict(list)