diff --git a/src/util.ts b/src/util.ts
index dfc09a2..dd42879 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -61,3 +61,9 @@ export function isPromise(obj: Promise<any>) {
     typeof obj.then === "function"
   );
 }
+
+export function ensureUniqueRecords(records: DNSRecord[]) {
+  return [
+    ...new Set(records.map((item: DNSRecord) => JSON.stringify(item))),
+  ].map((item) => JSON.parse(item));
+}