diff --git a/README.md b/README.md
index 8940044..d3f7c39 100644
--- a/README.md
+++ b/README.md
@@ -61,7 +61,7 @@ $config['GetAccessTokenCallback'] = function ($authorizer_appid) use ($config) {
     $authorizer_refresh_token = ''; // 通过$authorizer_appid从数据库去找吧，在授权绑定的时候获取
     $result = $open->refreshAccessToken($authorizer_appid, $authorizer_refresh_token);
     if (empty($result['authorizer_access_token'])) {
-        throw new \WeChat\Exceptions\InvalidResponseException($result['errmsg'], '0');
+        throw new \WeChat\Exceptions\InvalidResponseException($result['errmsg']??'system error', '0');
     }
     $data = [
         'authorizer_access_token'  => $result['authorizer_access_token'],
diff --git a/WeOpen/Service.php b/WeOpen/Service.php
index 5d8558f..567ea50 100644
--- a/WeOpen/Service.php
+++ b/WeOpen/Service.php
@@ -99,7 +99,7 @@ public function getComponentAccessToken()
         $url = 'https://api.weixin.qq.com/cgi-bin/component/api_component_token';
         $result = $this->httpPostForJson($url, $data);
         if (empty($result['component_access_token'])) {
-            throw new InvalidResponseException($result['errmsg'], $result['errcode'], $data);
+            throw new InvalidResponseException($result['errmsg']??'system error', $result['errcode']??-1, $data);
         }
         Tools::setCache($cache, $result['component_access_token'], 7000);
         return $result['component_access_token'];
@@ -122,7 +122,7 @@ public function getAuthorizerInfo($authorizerAppid)
         ];
         $result = $this->httpPostForJson($url, $data);
         if (empty($result['authorizer_info'])) {
-            throw new InvalidResponseException($result['errmsg'], $result['errcode'], $data);
+            throw new InvalidResponseException($result['errmsg']??'system error', $result['errcode']??-1, $data);
         }
         return $result['authorizer_info'];
     }
@@ -244,7 +244,7 @@ public function getQueryAuthorizerInfo($authCode = null)
         ];
         $result = $this->httpPostForJson($url, $data);
         if (empty($result['authorization_info'])) {
-            throw new InvalidResponseException($result['errmsg'], $result['errcode'], $data);
+            throw new InvalidResponseException($result['errmsg']??'system error', $result['errcode']??-1, $data);
         }
         $authorizerAppid = $result['authorization_info']['authorizer_appid'];
         $authorizerAccessToken = $result['authorization_info']['authorizer_access_token'];
@@ -272,7 +272,7 @@ public function refreshAccessToken($authorizerAppid, $authorizerRefreshToken)
         ];
         $result = $this->httpPostForJson($url, $data);
         if (empty($result['authorizer_access_token'])) {
-            throw new InvalidResponseException($result['errmsg'], $result['errcode'], $data);
+            throw new InvalidResponseException($result['errmsg']??'system error', $result['errcode']??-1, $data);
         }
         // 缓存授权公众号访问 ACCESS_TOKEN
         Tools::setCache("{$authorizerAppid}_access_token", $result['authorizer_access_token'], 7000);
diff --git a/_test/open.php b/_test/open.php
index 6699927..84f62f1 100644
--- a/_test/open.php
+++ b/_test/open.php
@@ -33,7 +33,7 @@
         $authorizer_refresh_token = 'L5uFIa0U6KLalPyXckyqoVIJYLhsfrg8k9YzybZIHsx'; // 从数据库去找吧，在授权绑定的时候获取到了
         $result = $open->refreshAccessToken($authorizer_appid, $authorizer_refresh_token);
         if (empty($result['authorizer_access_token'])) {
-            throw new \WeChat\Exceptions\InvalidResponseException($result['errmsg'], '0');
+            throw new \WeChat\Exceptions\InvalidResponseException($result['errmsg']??'system error', '0');
         }
         $data = [
             'authorizer_access_token'  => $result['authorizer_access_token'],
diff --git a/composer.json b/composer.json
index c26223c..fea2cf2 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
   "type": "library",
-  "name": "zoujingli/weopen-developer",
+  "name": "qfz9527/weopen-developer",
   "homepage": "https://github.com/zoujingli/WeOpenDeveloper",
   "description": "WeChat Open Platform Development",
   "license": "MIT",