diff --git a/README.md b/README.md
index e9ca24c..2583141 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,7 @@ Leave `PROXY_USER` and `PROXY_PASSWORD` empty for skip authentication options wh
 |PROXY_USER|String|EMPTY|Set proxy user (also required existed PROXY_PASS)|
 |PROXY_PASSWORD|String|EMPTY|Set proxy password for auth, used with PROXY_USER|
 |PROXY_PORT|String|1080|Set listen port for application inside docker container|
+|DIAL_TIMEOUT|String|3s|Set dial connect timeout,default 3s|
 
 ## Test running service