diff --git a/README.md b/README.md
index e1ce884..2126011 100644
--- a/README.md
+++ b/README.md
@@ -142,6 +142,7 @@ public function routeNotificationForOneSignal()
 - `setData($key, $value)`: Allows you to set additional data for the message payload. For more information check the [OneSignal documentation](https://documentation.onesignal.com/reference).
 - `setParameter($key, $value)`: Allows you to set additional parameters for the message payload that are available for the REST API. For more information check the [OneSignal documentation](https://documentation.onesignal.com/reference).
 - `setImageAttachments($imageUrl)`: Allows you to set one Image to all possible Attachments [OneSignal Attachment documentation](https://documentation.onesignal.com/reference#section-attachments).
+- `setGroup($group, $groupMessage)`: Set the Grouping Parameters for all available Systems (currently Android and Amazon (FireOs)) [Notification Grouping](https://documentation.onesignal.com/docs/how-notifications-work#notification-grouping).
 
 ### Button usage