diff --git a/README.md b/README.md
index 75ea048..b837fdd 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,7 @@
 [![Latest Version on Packagist][ico-version]][link-packagist]
 [![Software License][ico-license]](LICENSE.md)
 [![Build Status][ico-travis]][link-travis]
+[![StyleCI][ico-styleCi]][link-styleCi]
 [![Coverage Status][ico-scrutinizer]][link-scrutinizer]
 [![Quality Score][ico-code-quality]][link-code-quality]
 [![Total Downloads][ico-downloads]][link-downloads]
@@ -167,6 +168,7 @@ The MIT License (MIT). Please see [License File](LICENSE.md) for more informatio
 [ico-scrutinizer]: https://img.shields.io/scrutinizer/coverage/g/yemenifree/laravel-arabic-numbers-middleware.svg?style=flat-square
 [ico-code-quality]: https://img.shields.io/scrutinizer/g/yemenifree/laravel-arabic-numbers-middleware.svg?style=flat-square
 [ico-downloads]: https://img.shields.io/packagist/dt/yemenifree/laravel-arabic-numbers-middleware.svg?style=flat-square
+[ico-styleCi]: https://styleci.io/repos/105763061/shield?branch=master&style=flat
 
 [link-packagist]: https://packagist.org/packages/yemenifree/laravel-arabic-numbers-middleware
 [link-travis]: https://travis-ci.org/yemenifree/laravel-arabic-numbers-middleware
@@ -174,4 +176,5 @@ The MIT License (MIT). Please see [License File](LICENSE.md) for more informatio
 [link-code-quality]: https://scrutinizer-ci.com/g/yemenifree/laravel-arabic-numbers-middleware
 [link-downloads]: https://packagist.org/packages/yemenifree/laravel-arabic-numbers-middleware
 [link-author]: https://github.com/yemenifree
-[link-contributors]: ../../contributors
\ No newline at end of file
+[link-contributors]: ../../contributors
+[link-styleCi]: https://styleci.io/repos/105763061
\ No newline at end of file
diff --git a/src/Middleware/BaseNumbersMiddleware.php b/src/Middleware/BaseNumbersMiddleware.php
index 99c3a65..aed274d 100644
--- a/src/Middleware/BaseNumbersMiddleware.php
+++ b/src/Middleware/BaseNumbersMiddleware.php
@@ -16,7 +16,7 @@ abstract class BaseNumbersMiddleware extends TransformsRequest
     /** @var array */
     protected $easternNumbers = ['٠', '١', '٢', '٣', '٤', '٥', '٦', '٧', '٨', '٩'];
 
-    /** @var array */
+    /** @var array|mixed */
     protected $config;
 
     /**
diff --git a/src/ServiceProvider.php b/src/ServiceProvider.php
index 8b94fd0..6956e7e 100644
--- a/src/ServiceProvider.php
+++ b/src/ServiceProvider.php
@@ -33,9 +33,9 @@ class ServiceProvider extends BaseServiceProvider
     /**
      * auto append middleware
      *
-     * @var array
+     * @var Collection
      */
-    protected $auto_middleware = [];
+    protected $auto_middleware;
 
 
     /**