diff --git a/mitama/models/nodes.py b/mitama/models/nodes.py
index 55606ed..48d0592 100644
--- a/mitama/models/nodes.py
+++ b/mitama/models/nodes.py
@@ -592,9 +592,9 @@ def push(self, data):
             webpush(
                 subscription_info=json.loads(self.subscription),
                 data=json.dumps(data),
-                vapid_private_key=self._project.vapid.private_key,
+                vapid_private_key=self._project.vapid['private_key'],
                 vapid_claims={
-                    "sub": "mailto:{}".format(self._project.vapid.mailto)
+                    "sub": "mailto:{}".format(self._project.vapid['mailto'])
                 }
             )
         except Exception as err: