diff --git a/nixos/configuration.nix b/nixos/configuration.nix
index 992d653..e0245af 100644
--- a/nixos/configuration.nix
+++ b/nixos/configuration.nix
@@ -120,6 +120,7 @@ in {
     id = ["24353659"];
   };
 
+  users.mutableUsers = false;
   users.users.shahab = {
     shell = pkgs.zsh;