diff --git a/configuration.nix b/configuration.nix
index c89e671..4296cb8 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -135,6 +135,9 @@ with pkgs;
   # MOTD message
   programs.fish.interactiveShellInit = "${./scripts/motd.sh}";
 
+  # NixOS version
+  system.stateVersion = "22.05";
+
   # Import other configuration modules
   imports = [
     ./modules/hardware-configuration.nix