diff --git a/scnserver/push/firebase.go b/scnserver/push/firebase.go
index 22b3733..dc4c973 100644
--- a/scnserver/push/firebase.go
+++ b/scnserver/push/firebase.go
@@ -65,7 +65,6 @@ func (fb FirebaseConnector) SendNotification(ctx context.Context, user models.Us
 			"notification": gin.H{
 				"title": msg.Title,
 				"body":  msg.ShortContent(),
-				"sound": "default",
 			},
 			"apns": gin.H{},
 		}