diff --git a/api/src/webhook/schemas/webhook-notification.schema.ts b/api/src/webhook/schemas/webhook-notification.schema.ts
index 3e366dc..f16a9f1 100644
--- a/api/src/webhook/schemas/webhook-notification.schema.ts
+++ b/api/src/webhook/schemas/webhook-notification.schema.ts
@@ -21,7 +21,7 @@ export class WebhookNotification {
   @Prop({ type: Types.ObjectId, ref: SMS.name })
   sms: SMS
 
-  @Prop({ type: String })
+  @Prop({ type: Date })
   deliveredAt: Date
 
   @Prop({ type: Date })