diff --git a/hosts/x86_64-linux/beleth/default.nix b/hosts/x86_64-linux/beleth/default.nix
index c66d9b7..3489500 100644
--- a/hosts/x86_64-linux/beleth/default.nix
+++ b/hosts/x86_64-linux/beleth/default.nix
@@ -135,7 +135,7 @@ with lib; {
   services.mullvad-vpn.enable = true;
 
   # Open ports in the firewall.
-  networking.firewall.package = pkgs.nftables;
+  networking.nftables.enable = true;
   networking.firewall.allowedTCPPorts = [22 80 443];
   networking.firewall.allowedUDPPorts = [51820];