diff --git a/schema/subscriptions/Subscription.json b/schema/subscriptions/Subscription.json
index d63495a9f0073f48713f014b676a70cb1f0f948a..79022bf9344592a9b7da312fa95a5d6c78721856 100644
--- a/schema/subscriptions/Subscription.json
+++ b/schema/subscriptions/Subscription.json
@@ -162,7 +162,8 @@
             {
               "required": [
                 "id",
-                "type"
+                "type",
+                "notification"
               ]
             },
             {