diff --git a/composer.json b/composer.json
index d4e6391..aeaf9da 100644
--- a/composer.json
+++ b/composer.json
@@ -21,9 +21,9 @@
         "loyalty"
     ],
     "require": {
-        "php": ">=5.5.0",
+        "php": ">=5.6.0",
         "ext-curl": "*",
-        "league/oauth2-client": "~1.0"
+        "league/oauth2-client": "~1.4"
     },
     "require-dev": {
         "phpunit/phpunit": "~4.0",
diff --git a/src/Provider/Kangaroo.php b/src/Provider/Kangaroo.php
index 8dc0c6b..3bb8590 100644
--- a/src/Provider/Kangaroo.php
+++ b/src/Provider/Kangaroo.php
@@ -2,9 +2,9 @@
 
 namespace KangarooRewards\OAuth2\Client\Provider;
 
+use KangarooRewards\OAuth2\Client\Provider\KangarooResourceOwner;
 use League\OAuth2\Client\Provider\AbstractProvider;
 use League\OAuth2\Client\Provider\Exception\IdentityProviderException;
-use KangarooRewards\OAuth2\Client\Provider\KangarooResourceOwner;
 use League\OAuth2\Client\Token\AccessToken;
 use League\OAuth2\Client\Tool\BearerAuthorizationTrait;
 use Psr\Http\Message\ResponseInterface;
@@ -80,7 +80,7 @@ public function getDefaultScopes()
     {
         return $this->defaultScopes;
     }
-    
+
     /**
      * Generate a Resource Owner object from a successful Resource Owner details request.
      *
@@ -119,17 +119,23 @@ protected function checkResponse(ResponseInterface $response, $data)
     {
         $acceptableStatuses = [200, 201];
         if (!in_array($response->getStatusCode(), $acceptableStatuses)) {
+
+            if (isset($data['error']['description'])) {
+                $message = $data['error']['description'];
+            } elseif (isset($data['error']['message'])) {
+                $message = $data['error']['message'];
+            } elseif (isset($data['message'])) {
+                $message = $data['message'];
+            } else {
+                $message = $response->getReasonPhrase();
+            }
+
             throw new IdentityProviderException(
-                $data['message'] ?: $response->getReasonPhrase(),
+                $message,
                 $response->getStatusCode(),
                 $response
             );
         }
-        // if (!empty($data['error'])) {
-        //     $message = $data['error'];
-        //     $message = isset($data['message']) ? $data['message'] : '';
-        //     throw new \Exception($message);
-        // }
     }
 
     /**