diff --git a/README.md b/README.md
index 38f504b..9118f7e 100644
--- a/README.md
+++ b/README.md
@@ -13,10 +13,19 @@ Also available in [Drupal sandbox](https://www.drupal.org/sandbox/yuhao6066/2612
   
   Please download SDK package and put inside "libraries" folder before install this module
 
+  ```shell
+  mkdir -p PATH_TO_DRUPAL/sites/all/libraries/overtrue_wechat
+  cd PATH_TO_DRUPAL/sites/all/libraries/overtrue_wechat
+  composer require "overtrue/wechat:~3.1"
+  ```
+
+  or
+
   ```shell
   cd PATH_TO_DRUPAL/sites/all/libraries
-  git clone https://github.com/overtrue/wechat.git
-  mv wechat/ overtrue_wechat/
+  git clone https://github.com/overtrue/wechat.git overtrue_wechat
+  # composer install --no-dev --prefer-dist --optimize-autoloader
+  composer install
   ```
   
   更多关于此SDK的信息请[参考文档](https://github.com/overtrue/wechat/wiki/%E5%BE%AE%E4%BF%A1%E6%94%AF%E4%BB%98)
diff --git a/commerce_wechatpay.module b/commerce_wechatpay.module
index 0f2dd15..8fdecde 100755
--- a/commerce_wechatpay.module
+++ b/commerce_wechatpay.module
@@ -24,7 +24,7 @@ function commerce_wechatpay_requirements($phase) {
     else {
       $requirements['overtrue_wechat']['value'] = t('Not Installed');
       $requirements['overtrue_wechat']['severity'] = REQUIREMENT_ERROR;
-      $requirements['overtrue_wechat']['description'] = t('Please download the overtrue_wechat SDK package via %url and place it inside libraries folder with structure -> "sites/all/libraries/overtrue_wechat/src/Wechat/..."', array('%url' => 'https://github.com/overtrue/wechat'));
+      $requirements['overtrue_wechat']['description'] = t('Please download the overtrue_wechat SDK package via %url and place it inside libraries folder with structure -> "sites/all/libraries/overtrue_wechat/vendor/autoload.php"', array('%url' => 'https://github.com/overtrue/wechat'));
     }
 
   }
@@ -52,8 +52,8 @@ function commerce_wechatpay_init() {
   // load sdk
   $path = libraries_get_path('overtrue_wechat');
   $realpath = drupal_realpath($path);
-  if(file_exists($realpath.'/autoload.php')){
-    include_once $realpath.'/autoload.php';
+  if(file_exists($realpath.'/vendor/autoload.php')){
+    include_once $realpath.'/vendor/autoload.php';
     include_once 'commerce_wechatpay.inc';
   }
   else {
@@ -560,4 +560,3 @@ function commerce_wechatpay_get_credentials_from_payment_instance($payment_metho
 
   return $credetials;
 }
-