diff --git a/system/default.nix b/system/default.nix
index 0d72b2e..a7037a4 100644
--- a/system/default.nix
+++ b/system/default.nix
@@ -191,7 +191,7 @@
     openssh = {
       enable = true;
       settings = {
-        PasswordAuthentication = true; # Enable password authentication.
+        PasswordAuthentication = false; # Enable password authentication.
         PermitRootLogin = "yes"; # Allow root login (not recommended for production).
       };
     };