diff --git a/README.md b/README.md
index 342a447..1d121b0 100644
--- a/README.md
+++ b/README.md
@@ -96,7 +96,7 @@ send custom message:
       echo This event is a pull request that had an assignee removed.
 ```
 
-send message using custom proxy (support `http`, `https`, and `socks5`)
+send message using custom proxy (support `http`, `https`, and `socks5`) like `socks5://127.0.0.1:1080` or `http://222.124.154.19:23500`
 
 ```yml
 - name: send message using socks5 proxy URL