diff --git a/backend/src/schema/types/type/NOTIFIED.gql b/backend/src/schema/types/type/NOTIFIED.gql
index 1182f2743..5557cbd54 100644
--- a/backend/src/schema/types/type/NOTIFIED.gql
+++ b/backend/src/schema/types/type/NOTIFIED.gql
@@ -2,8 +2,8 @@ type NOTIFIED {
   id: ID!
   from: NotificationSource
   to: User
-  createdAt: String
-  updatedAt: String
+  createdAt: String!
+  updatedAt: String!
   read: Boolean
   reason: NotificationReason
 }