diff --git a/src/modules/notifications/schemas/notification.schema.ts b/src/modules/notifications/schemas/notification.schema.ts
index 28e5657..6beb032 100644
--- a/src/modules/notifications/schemas/notification.schema.ts
+++ b/src/modules/notifications/schemas/notification.schema.ts
@@ -15,6 +15,9 @@ export const NOTIFICATION_TYPES = [
   'reply',
   'system',
   'collaboration_request',
+  'collaboration_request_approved',
+  'collaboration_request_rejected',
+  'collaboration_request_cancelled',
   'follow_request',
   'follow_request_approved',
   'follow_request_rejected',