diff --git a/dist/util.d.ts b/dist/util.d.ts
index 2602eb5..c0fa69a 100644
--- a/dist/util.d.ts
+++ b/dist/util.d.ts
@@ -8,4 +8,5 @@ export declare function resolverError(e: Error | string): DNSResult;
 export declare function resolveSuccess(records: DNSRecord[]): DNSResult;
 export declare function normalizeDomain(domain: string): string;
 export declare function isPromise(obj: Promise<any>): boolean;
+export declare function ensureUniqueRecords(records: DNSRecord[]): any[];
 //# sourceMappingURL=util.d.ts.map
diff --git a/dist/util.d.ts.map b/dist/util.d.ts.map
index ec7e713..92d9930 100644
--- a/dist/util.d.ts.map
+++ b/dist/util.d.ts.map
@@ -1 +1 @@
-{"version":3,"file":"util.d.ts","sourceRoot":"","sources":["../src/util.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,SAAS,EAAE,SAAS,EAAE,MAAM,YAAY,CAAC;AAElD,wBAAgB,MAAM,CAAC,MAAM,EAAE,MAAM,GAAG,MAAM,CAM7C;AAED,wBAAgB,MAAM,CAAC,MAAM,EAAE,MAAM,GAAG,MAAM,CAS7C;AAED,wBAAgB,IAAI,CAAC,EAAE,EAAE,MAAM,WAI9B;AAED,wBAAgB,QAAQ,CAAC,MAAM,EAAE,MAAM,WAItC;AACD,wBAAgB,qBAAqB,IAAI,SAAS,CAIjD;AAED,wBAAgB,aAAa,CAAC,CAAC,EAAE,KAAK,GAAG,MAAM,GAAG,SAAS,CAQ1D;AAED,wBAAgB,cAAc,CAAC,OAAO,EAAE,SAAS,EAAE,GAAG,SAAS,CAI9D;AACD,wBAAgB,eAAe,CAAC,MAAM,EAAE,MAAM,GAAG,MAAM,CAEtD;AACD,wBAAgB,SAAS,CAAC,GAAG,EAAE,OAAO,CAAC,GAAG,CAAC,WAM1C"}
\ No newline at end of file
+{"version":3,"file":"util.d.ts","sourceRoot":"","sources":["../src/util.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,SAAS,EAAE,SAAS,EAAE,MAAM,YAAY,CAAC;AAElD,wBAAgB,MAAM,CAAC,MAAM,EAAE,MAAM,GAAG,MAAM,CAM7C;AAED,wBAAgB,MAAM,CAAC,MAAM,EAAE,MAAM,GAAG,MAAM,CAS7C;AAED,wBAAgB,IAAI,CAAC,EAAE,EAAE,MAAM,WAI9B;AAED,wBAAgB,QAAQ,CAAC,MAAM,EAAE,MAAM,WAItC;AACD,wBAAgB,qBAAqB,IAAI,SAAS,CAIjD;AAED,wBAAgB,aAAa,CAAC,CAAC,EAAE,KAAK,GAAG,MAAM,GAAG,SAAS,CAQ1D;AAED,wBAAgB,cAAc,CAAC,OAAO,EAAE,SAAS,EAAE,GAAG,SAAS,CAI9D;AACD,wBAAgB,eAAe,CAAC,MAAM,EAAE,MAAM,GAAG,MAAM,CAEtD;AACD,wBAAgB,SAAS,CAAC,GAAG,EAAE,OAAO,CAAC,GAAG,CAAC,WAM1C;AAED,wBAAgB,mBAAmB,CAAC,OAAO,EAAE,SAAS,EAAE,SAIvD"}
\ No newline at end of file
diff --git a/dist/util.js b/dist/util.js
index 27f7aea..3581529 100644
--- a/dist/util.js
+++ b/dist/util.js
@@ -46,3 +46,8 @@ export function isPromise(obj) {
         (typeof obj === "object" || typeof obj === "function") &&
         typeof obj.then === "function");
 }
+export function ensureUniqueRecords(records) {
+    return [
+        ...new Set(records.map((item) => JSON.stringify(item))),
+    ].map((item) => JSON.parse(item));
+}