diff --git a/README.md b/README.md
index 660fa4d..2f6d3b1 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ cactus-tunnel server
 ## Client
 Run the command
 ```
-cactus-tunnel client -v ws://[TUNNEL_SERVER]:[TUNNEL_SERVER_PORT] [HOST_SERVER]:[HOST_SERVER_PORT] -h [CLIENT_TARGET] -P [CLIENT_TARGET_PORT]
+cactus-tunnel client -v ws://[TUNNEL_SERVER]:[TUNNEL_SERVER_PORT] [HOST_SERVER]:[HOST_SERVER_PORT] -h [CLIENT_TARGET] -p [CLIENT_TARGET_PORT]
 ```
 ### Explanation
 - `ws://[TUNNEL_SERVER]:[TUNNEL_SERVER_PORT]` - The tunnel server itself