diff --git a/roles/dns/master/templates/zone.conf b/roles/dns/master/templates/zone.conf
index cd61126..074ab0d 100644
--- a/roles/dns/master/templates/zone.conf
+++ b/roles/dns/master/templates/zone.conf
@@ -2,8 +2,10 @@ zone "{{ domain }}" {
   type master;
   file "{{ database_file }}";
   key-directory "{{ keys_directory }}";
+  // dnssec
   inline-signing yes;
   auto-dnssec maintain;
+  // notify & transfer
   notify yes;
   allow-transfer {
     {% for fqdn in slaves %}