diff --git a/src/Grant/AbstractGrant.php b/src/Grant/AbstractGrant.php
index 52636173..0ac0cdf5 100644
--- a/src/Grant/AbstractGrant.php
+++ b/src/Grant/AbstractGrant.php
@@ -41,7 +41,7 @@ abstract class AbstractGrant implements GrantTypeInterface
 
     /**
      * AuthServer instance
-     * @var AuthServer
+     * @var \League\OAuth2\Server\AuthorizationServer
      */
     protected $server;