diff --git a/app/library/OAuth/Adapter/League.php b/app/library/OAuth/Adapter/League.php
index 3d04fdf..cf27257 100644
--- a/app/library/OAuth/Adapter/League.php
+++ b/app/library/OAuth/Adapter/League.php
@@ -13,9 +13,10 @@ class League implements AdapterInterface
      * @var array
      */
     protected $_providerClasses = array(
-        'github' => '\League\OAuth2\Client\Provider\Github',
-        'gitlab' => '\Omines\OAuth2\Client\Provider\Gitlab',
-        'google' => '\League\OAuth2\Client\Provider\Google',
+        'github'    => '\League\OAuth2\Client\Provider\Github',
+        'gitlab'    => '\Omines\OAuth2\Client\Provider\Gitlab',
+        'google'    => '\League\OAuth2\Client\Provider\Google',
+        'linkedin'  => '\League\OAuth2\Client\Provider\LinkedIn',
     );
 
     /**