diff --git a/flake.nix b/flake.nix
index 612fefe4..ac242f89 100644
--- a/flake.nix
+++ b/flake.nix
@@ -59,6 +59,7 @@
               virtualisation.docker.enable = true;
               services.openssh.enable = true;
               services.openssh.settings.PermitRootLogin = "prohibit-password";
+              services.openssh.settings.PasswordAuthentication = false;
             };
 
             # NixOS specific configuration