diff --git a/README.md b/README.md
index c2df736..c622262 100644
--- a/README.md
+++ b/README.md
@@ -119,6 +119,12 @@ this.body = [
   }
 ];
 ```
+
+#### 回复空串
+```js
+this.body = '';
+```
+
 #### 转发到客服接口
 ```js
 this.body = {
diff --git a/lib/wechat.js b/lib/wechat.js
index c93c3b9..538dd2c 100644
--- a/lib/wechat.js
+++ b/lib/wechat.js
@@ -271,7 +271,16 @@ wechat.prototype.middleware = function (handle) {
         }
       }
 
-      replyMessageXml = reply(this.body, formated.ToUserName, formated.FromUserName);
+      /*
+       * 假如服务器无法保证在五秒内处理并回复，可以直接回复空串。
+       * 微信服务器不会对此作任何处理，并且不会发起重试。
+       */
+      if (this.body === '') {
+        return;
+      }
+
+      var replyMessageXml = reply(this.body, formated.ToUserName, formated.FromUserName);
+
       if (!query.encrypt_type || query.encrypt_type === 'raw') {
         this.body = replyMessageXml;
       } else {
diff --git a/package.json b/package.json
index 6f84ab6..3553c71 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,10 @@
   "scripts": {
     "test": "make test-all"
   },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/node-webot/co-wechat"
+  },
   "keywords": [
     "wechat",
     "wexin"