diff --git a/doc/openvpn_guide.md b/doc/openvpn_guide.md
index c6c10d2..035eb04 100644
--- a/doc/openvpn_guide.md
+++ b/doc/openvpn_guide.md
@@ -15,7 +15,7 @@ assume server ip is 45.66.77.88
 ```
 
 #### hint
-You can add `--cipher xor` `--auth simple` to **both** sides to obtain maximum performance(but poor security).
+You can add `--cipher-mode xor` `--auth-mode simple` to **both** sides to obtain maximum performance(but poor security).
 
 # openvpn config