diff --git a/src/Providers/LaravelServiceProvider.php b/src/Providers/LaravelServiceProvider.php
index 0ef8cb1..82062f7 100644
--- a/src/Providers/LaravelServiceProvider.php
+++ b/src/Providers/LaravelServiceProvider.php
@@ -22,11 +22,11 @@ public function register()
 
     public function boot()
     {
-        $formatter = $this->app['config']->get('response.format.0',\Jiannei\Response\Laravel\Support\Format::class);
-        $config = $this->app['config']->get('response.format.1',[]);
+        $formatter = $this->app['config']->get('response.format.0', \Jiannei\Response\Laravel\Support\Format::class);
+        $config = $this->app['config']->get('response.format.1', []);
 
         if (is_string($formatter) && class_exists($formatter)) {
-            $this->app->bind(\Jiannei\Response\Laravel\Contracts\Format::class, function () use ($formatter,$config) {
+            $this->app->bind(\Jiannei\Response\Laravel\Contracts\Format::class, function () use ($formatter, $config) {
                 return new $formatter($config);
             });
         }