diff --git a/krebs/4lib/types.nix b/krebs/4lib/types.nix
index 92410dd58..975c36b08 100644
--- a/krebs/4lib/types.nix
+++ b/krebs/4lib/types.nix
@@ -20,6 +20,7 @@ types // rec {
         type = attrsOf net;
         apply = x: assert hasAttr "retiolum" x; x;
       };
+
       secure = mkOption {
         type = bool;
         default = false;
@@ -73,6 +74,11 @@ types // rec {
         }));
         default = null;
       };
+      zones = mkOption {
+        default = [];
+        # TODO: string is either MX, NS, A or AAAA
+        type = with types; listOf (attrsOf str);
+      };
     };
   });