diff --git a/api/src/webhook/schemas/webhook-subscription.schema.ts b/api/src/webhook/schemas/webhook-subscription.schema.ts
index 3e69d04..d7703b6 100644
--- a/api/src/webhook/schemas/webhook-subscription.schema.ts
+++ b/api/src/webhook/schemas/webhook-subscription.schema.ts
@@ -9,7 +9,7 @@ export type WebhookSubscriptionDocument = WebhookSubscription & Document
 export class WebhookSubscription {
   _id?: Types.ObjectId
 
-  @Prop({ type: Types.ObjectId, ref: User.name })
+  @Prop({ type: Types.ObjectId, ref: User.name, required: true })
   user: User
 
   @Prop({ type: Boolean, default: true })