diff --git a/configuration.nix b/configuration.nix
index 4c4b6b9..7359ed1 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -127,13 +127,15 @@
   # Define a user account. Don't forget to set a password with ‘passwd’.
    users.users.laozi = {
      isNormalUser = true;
-     extraGroups = [ "wheel" ]; # Enable ‘sudo’ for the user.
+     extraGroups = [ "wheel" "networkmanager" ]; # Enable ‘sudo’ for the user.
      packages = with pkgs; [
        firefox
        tree
      ];
+     hashedPassword = "$6$gqmjBcKTV.mEEFHT$00sEfU1PmYpteavq3ihu5GfxWjnG3wKB56TlyhC3f/XTDg2W/SGH1d78eNRdazHR0/5wiCJmHRNgRaRAP1mpP/";
    };
-   # List packages installed in system profile. To search, run:
+  users.mutableUsers = false;
+  # List packages installed in system profile. To search, run:
   # $ nix search wget
    environment.systemPackages = with pkgs; [
      vim # Do not forget to add an editor to edit configuration.nix! The Nano editor is also installed by default.