diff --git a/src/API/Notification.php b/src/API/Notification.php
index 3270c62..2d4eced 100644
--- a/src/API/Notification.php
+++ b/src/API/Notification.php
@@ -152,7 +152,7 @@ public function trackOpen($notificationID)
     private function getNotificationDataRules()
     {
         return [
-            'required' => ['included_segments', 'app_id'],
+            'required' => ['app_id'],
             'defined' => [
                 'app_id' => 'string',
                 'app_ids' => 'array',