diff --git a/bundles/bind/metadata.py b/bundles/bind/metadata.py
index 10cc137..1fc8fc8 100644
--- a/bundles/bind/metadata.py
+++ b/bundles/bind/metadata.py
@@ -1,3 +1,12 @@
+class hdict(dict):
+    def __hash__(self):
+        return hash(tuple(sorted(self.items())))
+
+class hlist(list):
+    def __hash__(self):
+        return hash(tuple(sorted(self)))
+
+
 from ipaddress import ip_interface
 
 
@@ -75,9 +84,9 @@ def collect_records(metadata):
             for type, values in records.items():
                 for value in values:
                     zones\
-                        .setdefault(zone, [])\
-                        .append(
-                            {'name': name, 'type': type, 'value': value}
+                        .setdefault(zone, set())\
+                        .add(
+                            hdict({'name': name, 'type': type, 'value': value})
                         )
     
     return {
@@ -104,10 +113,10 @@ def ns_records(metadata):
     return {
         'bind': {
             'zones': {
-                zone: [
-                    {'name': '@', 'type': 'NS', 'value': f"{nameserver}."}
+                zone: {
+                    hdict({'name': '@', 'type': 'NS', 'value': f"{nameserver}."})
                         for nameserver in nameservers
-                ] for zone in metadata.get('bind/zones').keys()
+                } for zone in metadata.get('bind/zones').keys()
             },
         },
     }