diff --git a/README.md b/README.md
index 8bc8083..8f043af 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,6 @@ chmod 600 ~/.ssh/authorized_keys
 ```
 
 ```
-sed -i "s/.*PasswordAuthentication.*/PasswordAuthentication no/g" /etc/ssh/sshd_config
+sed -ri "s/^#? *PasswordAuthentication *yes.*/PasswordAuthentication no/" /etc/ssh/sshd_config
 sudo systemctl restart ssh
 ```