diff --git a/README.md b/README.md
index 476678a..6c3608c 100644
--- a/README.md
+++ b/README.md
@@ -9,24 +9,7 @@
 3. 安装依赖：`npm i`。
 4. 安装 pm2：`npm i -g pm2`。
 5. 使用 Nginx 反代我们的 Node.js 服务，默认端口 3000。
-    1. 在 `/etc/nginx/site-enabled/` 目录下创建文件 `wechat-push-service.conf`（主配置文件 nginx.conf 内要有 `include /etc/nginx/sites-enabled/*.conf;`）:
-        ```conf
-        server {
-            listen 443 ssl http2;
-            listen [::]:443 ssl http2;
-            server_name 你的域名;
-        
-            location / {
-                proxy_pass http://localhost:3000;  # 注意如果你改变了默认端口，记得在这里进行更新
-                proxy_http_version 1.1;
-                proxy_set_header Upgrade $http_upgrade;
-                proxy_set_header Connection 'upgrade';
-                proxy_set_header Host $host;
-                proxy_set_header X-Forwarded-For $remote_addr;
-                proxy_cache_bypass $http_upgrade;
-            }
-        }
-        ```
+    1. 修改应用根目录下的 `nginx.conf` 中的域名以及端口号，并创建软链接：`sudo ln -s ./nginx.conf /etc/nginx/site-enabled/wechat-push-service.conf` 
     2. 之后使用 [certbot](https://certbot.eff.org/lets-encrypt/ubuntuxenial-nginx) 申请证书：`sudo certbot --nginx`。
     3. 重启 Nginx 服务：`sudo service nginx restart`。
 
diff --git a/nginx.conf b/nginx.conf
new file mode 100644
index 0000000..ff29e71
--- /dev/null
+++ b/nginx.conf
@@ -0,0 +1,15 @@
+server {
+    listen 443 ssl http2;
+    listen [::]:443 ssl http2;
+    server_name 你的域名;
+
+    location / {
+        proxy_pass http://localhost:3000;  # 注意如果你改变了默认端口，记得在这里进行更新
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection 'upgrade';
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For $remote_addr;
+        proxy_cache_bypass $http_upgrade;
+    }
+}
\ No newline at end of file
diff --git a/utils.js b/utils.js
index a51e664..33e70fb 100644
--- a/utils.js
+++ b/utils.js
@@ -11,7 +11,7 @@ module.exports = {
         if (res.data && res.data.access_token) {
           console.log("Token requested.");
           token = res.data.access_token;
-          app.access_token = token;
+          app.locals.access_token = token;
         } else {
           console.error(res.data);
         }
@@ -21,7 +21,7 @@ module.exports = {
 
   pushMessage: function (req, res, content) {
     // Reference: https://mp.weixin.qq.com/debug/cgi-bin/readtmpl?t=tmplmsg/faq_tmpl
-    let access_token = req.app.access_token;
+    let access_token = req.app.locals.access_token;
     let request_data = {
       touser: process.env.OPEN_ID,
       template_id: process.env.TEMPLATE_ID,