diff --git a/config/response.php b/config/response.php
index 981c378..9994085 100644
--- a/config/response.php
+++ b/config/response.php
@@ -12,5 +12,5 @@
 return [
     'enum' => \Jiannei\Response\Laravel\Repositories\Enums\ResponseCodeEnum::class,
 
-    'validation_error_code' => \Jiannei\Response\Laravel\Repositories\Enums\ResponseCodeEnum::HTTP_UNPROCESSABLE_ENTITY
+    'validation_error_code' => \Jiannei\Response\Laravel\Repositories\Enums\ResponseCodeEnum::HTTP_UNPROCESSABLE_ENTITY,
 ];
diff --git a/src/Repositories/Enums/HttpStatusCodeEnum.php b/src/Repositories/Enums/HttpStatusCodeEnum.php
index e333167..e927e9a 100644
--- a/src/Repositories/Enums/HttpStatusCodeEnum.php
+++ b/src/Repositories/Enums/HttpStatusCodeEnum.php
@@ -1,9 +1,16 @@
 <?php
 
+/*
+ * This file is part of the Jiannei/laravel-response.
+ *
+ * (c) Jiannei <longjian.huang@foxmail.com>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
 
 namespace Jiannei\Response\Laravel\Repositories\Enums;
 
-
 use Jiannei\Enum\Laravel\Contracts\LocalizedEnumContract;
 use Jiannei\Enum\Laravel\Enum;
 
@@ -72,4 +79,4 @@ class HttpStatusCodeEnum extends Enum implements LocalizedEnumContract
     const HTTP_LOOP_DETECTED = 508;                                               // RFC5842
     const HTTP_NOT_EXTENDED = 510;                                                // RFC2774
     const HTTP_NETWORK_AUTHENTICATION_REQUIRED = 511;                             // RFC6585
-}
\ No newline at end of file
+}
diff --git a/src/Repositories/Enums/ResponseCodeEnum.php b/src/Repositories/Enums/ResponseCodeEnum.php
index a4a3172..f3cf0d2 100644
--- a/src/Repositories/Enums/ResponseCodeEnum.php
+++ b/src/Repositories/Enums/ResponseCodeEnum.php
@@ -13,5 +13,4 @@
 
 abstract class ResponseCodeEnum extends HttpStatusCodeEnum
 {
-
 }