diff --git a/Provider.php b/Provider.php
index b5225b2..0566274 100755
--- a/Provider.php
+++ b/Provider.php
@@ -130,7 +130,9 @@ public function getAccessTokenResponse($code)
         ]);
 
         $this->credentialsResponseBody = json_decode($response->getBody(), true);
-        $this->openId = $this->credentialsResponseBody['openid'];
+        if (isset($this->credentialsResponseBody['openid'])){
+            $this->openId = $this->credentialsResponseBody['openid'];
+        }
 
         return $this->credentialsResponseBody;
     }