diff --git a/server/configuration.nix b/server/configuration.nix
index d779f5a7..f8a06a50 100644
--- a/server/configuration.nix
+++ b/server/configuration.nix
@@ -197,6 +197,7 @@
   # Select internationalisation properties.
   i18n.defaultLocale = "en_US.UTF-8";
 
+  security.sudo.wheelNeedsPassword = false;
   # Define a user account. Don't forget to set a password with ‘passwd’.
   users.users.procolix = {
     isNormalUser = true;
@@ -251,6 +252,7 @@
 
   # Enable the OpenSSH daemon.
   services.openssh.enable = true;
+  services.openssh.settings.PasswordAuthentication = false;
 
   # Enable xe-guest-utilities
   services.xe-guest-utilities.enable = true;