diff --git a/hosts/servo/net.nix b/hosts/servo/net.nix
index f7f2224d3..c4e27d871 100644
--- a/hosts/servo/net.nix
+++ b/hosts/servo/net.nix
@@ -16,6 +16,7 @@
   # TODO: split these into the submodules
   networking.firewall.allowedTCPPorts = [
     25   # SMTP
+    53   # DNS
     80   # HTTP
     143  # IMAP
     443  # HTTPS