diff --git a/nixos/configuration.nix b/nixos/configuration.nix
index 75d5875..06af484 100644
--- a/nixos/configuration.nix
+++ b/nixos/configuration.nix
@@ -105,6 +105,7 @@ in {
 
   security.rtkit.enable = true;
 
+  users.mutableUsers = false;
   users.users.shahab = {
     shell = pkgs.zsh;