Add some security modules
diff --git a/modules/firewall.nix b/modules/firewall.nix
index 09045f4..54943a9 100644
--- a/modules/firewall.nix
+++ b/modules/firewall.nix
@@ -1,3 +1,3 @@
 {
-  networking.firewall.enable = true;
+  config.networking.firewall.enable = true;
 }