diff --git a/src/FcmServiceProvider.php b/src/FcmServiceProvider.php
index e243bea..573d328 100644
--- a/src/FcmServiceProvider.php
+++ b/src/FcmServiceProvider.php
@@ -20,8 +20,8 @@ public function boot()
 
     public function register()
     {
-        $this->app->singleton('fcm', function($app) {
-            return new Fcm;
+        $this->app->singleton('fcm', function ($app) {
+            return new Fcm();
         });
     }
 }