diff --git a/docs/en/install/README.md b/docs/en/install/README.md
index 4487a6c270..19e5af9922 100644
--- a/docs/en/install/README.md
+++ b/docs/en/install/README.md
@@ -283,12 +283,16 @@ Use environment variables is recommended to avoid conflicts during upgrade.
 
 `LOGGER_LEVEL`: specifies the maximum [level](https://github.com/winstonjs/winston#logging-levels) of messages to the console and log file, default to `info`
 
-`PROXY_PROTOCOL`: Using proxy of such protocol, Supports socks, socks4,socks4a,socks5,socks5h
+`PROXY_PROTOCOL`: Using proxy, Supports socks, http, https
 
-`PROXY_HOST`: host of the proxy
+`PROXY_HOST`: host or IP of the proxy
 
 `PROXY_PORT`: port of the proxy
 
+`PROXY_AUTH`: credentials to authenticate a user agent to proxy server, `Proxy-Authorization: Basic ${process.env.PROXY_AUTH}`
+
+`PROXY_URL_REGEX`: regex for url of enabling proxy, default to `.*`
+
 ### User Authentication
 
 Routes in `protected_route.js` will be protected using HTTP Basic Authentication.
diff --git a/docs/install/README.md b/docs/install/README.md
index 0dbb639849..0e4737872e 100644
--- a/docs/install/README.md
+++ b/docs/install/README.md
@@ -289,11 +289,15 @@ gcloud app deploy
 
 `LOGGER_LEVEL`: 指明输出到 console 和日志文件的日志的最大[等级](https://github.com/winstonjs/winston#logging-levels)，默认 `info`
 
-`PROXY_PROTOCOL`: 使用 proxy 来访问的协议, 目前只支持 socks, socks4,socks4a,socks5,socks5h
+`PROXY_PROTOCOL`: 使用代理, 支持 socks, http, https
 
-`PROXY_HOST`: proxy 的域名
+`PROXY_HOST`: 代理服务器域名或 IP
 
-`PROXY_PORT`: proxy 的端口
+`PROXY_PORT`: 代理服务器端口
+
+`PROXY_AUTH`: 给代理服务器的身份验证凭证，`Proxy-Authorization: Basic ${process.env.PROXY_AUTH}`
+
+`PROXY_URL_REGEX`: 启用代理的 URL 正则表达式，默认全部开启 `.*`
 
 ### 用户认证