diff --git a/README.md b/README.md
index 76fef8e..ba0fdc0 100644
--- a/README.md
+++ b/README.md
@@ -12,10 +12,10 @@ PermitRootLogin no
 ## Create key
 
 ```bash
-ssh-keygen -t ecdsa -b 521
+ssh-keygen
 
-# specif an file
-ssh-keygen -t ecdsa -b 521 -f ~/.ssh/key-ecdsa
+# specify a file
+ssh-keygen -f key
 ```
 
 ## Copy public key