diff --git a/nixbld-etc-nixos/configuration.nix b/nixbld-etc-nixos/configuration.nix
index 87ef10af..42eb7226 100644
--- a/nixbld-etc-nixos/configuration.nix
+++ b/nixbld-etc-nixos/configuration.nix
@@ -90,7 +90,7 @@ in
     hostName = "nixbld";
     hostId = "e423f012";
     firewall = {
-      allowedTCPPorts = [ 53 80 443 7402 3939 3940 ];
+      allowedTCPPorts = [ 53 80 443 7402 ];
       allowedUDPPorts = [ 53 67 ];
       trustedInterfaces = [ netifLan ];
     };