diff --git a/src/Client.php b/src/Client.php
index 78f9009e..727a6e28 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -164,7 +164,7 @@ public function skipsAuthorization()
      */
     public function hasGrantType($grantType)
     {
-        if (! isset($this->grant_types) || ! is_array($this->grant_types)) {
+        if (! isset($this->attributes['grant_types']) || ! is_array($this->grant_types)) {
             return true;
         }
 
@@ -179,7 +179,7 @@ public function hasGrantType($grantType)
      */
     public function hasScope($scope)
     {
-        if (! isset($this->scopes) || ! is_array($this->scopes)) {
+        if (! isset($this->attributes['scopes']) || ! is_array($this->scopes)) {
             return true;
         }