diff --git a/Public API v1.yaml b/Public API v1.yaml
index 5b711a1..9b46e55 100644
--- a/Public API v1.yaml	
+++ b/Public API v1.yaml	
@@ -2761,6 +2761,7 @@ components:
         - type
         - text
         - read
+        - timestamp
       type: object
       properties:
         type:
@@ -2777,6 +2778,8 @@ components:
           type: boolean
         data:
           type: object
+        timestamp:
+          type: number
     NotificationAction:
       type: string
       enum:
diff --git a/backend/notifications.js b/backend/notifications.js
index 954c5d4..daa0a83 100644
--- a/backend/notifications.js
+++ b/backend/notifications.js
@@ -26,7 +26,8 @@ exports.createNotification = (type, actions, data, user_uid) => {
         data: data,
         user_uid: user_uid,
         uid: uuid(),
-        read: false
+        read: false,
+        timestamp: Date.now()/1000
     }
     return notification;
 }
diff --git a/src/api-types/models/Notification.ts b/src/api-types/models/Notification.ts
index 704533c..ce99fe6 100644
--- a/src/api-types/models/Notification.ts
+++ b/src/api-types/models/Notification.ts
@@ -12,4 +12,5 @@ export type Notification = {
     action?: Array<NotificationAction>;
     read: boolean;
     data?: any;
+    timestamp: number;
 };
\ No newline at end of file