diff --git a/dist/resolverModule.d.ts b/dist/resolverModule.d.ts
index 00bf895..61d39e8 100644
--- a/dist/resolverModule.d.ts
+++ b/dist/resolverModule.d.ts
@@ -18,7 +18,7 @@ export interface ResolverModule extends ResolverModuleConstructor {
     options: ResolverOptions,
     bypassCache: boolean
   ): Promise<DNSResult>;
-  getSupportedTlds(): string[];
+  getSupportedTlds(): string[] | Promise<string[]>;
 }
 export declare abstract class AbstractResolverModule {
   protected resolver: ResolverRegistry;
@@ -28,8 +28,8 @@ export declare abstract class AbstractResolverModule {
     options: ResolverOptions,
     bypassCache: boolean
   ): Promise<DNSResult>;
-  getSupportedTlds(): string[];
-  isTldSupported(domain: string): boolean;
+  getSupportedTlds(): string[] | Promise<string[]>;
+  isTldSupported(domain: string): boolean | Promise<boolean>;
 }
 export {};
 //# sourceMappingURL=resolverModule.d.ts.map
diff --git a/dist/resolverModule.d.ts.map b/dist/resolverModule.d.ts.map
index b9429f5..9f10140 100644
--- a/dist/resolverModule.d.ts.map
+++ b/dist/resolverModule.d.ts.map
@@ -1 +1 @@
-{"version":3,"file":"resolverModule.d.ts","sourceRoot":"","sources":["../src/resolverModule.ts"],"names":[],"mappings":"AAAA,OAAO,KAAK,EAAE,SAAS,EAAE,eAAe,EAAE,MAAM,YAAY,CAAC;AAG7D,OAAO,OAAO,gBAAgB;IAC5B,IAAI,SAAS,IAAI,GAAG,CAAC,cAAc,CAAC,GAAG,OAAO,CAAC,GAAG,CAAC,cAAc,CAAC,CAAC,CAAC;IACpE,OAAO,CACL,MAAM,EAAE,MAAM,EACd,OAAO,CAAC,EAAE,eAAe,EACzB,WAAW,CAAC,EAAE,OAAO,GACpB,OAAO,CAAC,SAAS,CAAC;IACrB,QAAQ,CAAC,QAAQ,EAAE,cAAc,GAAG,IAAI;IACxC,KAAK,IAAI,IAAI;CACd;AAED,MAAM,WAAW,yBAAyB;IACxC,KAAK,QAAQ,EAAE,gBAAgB,OAAE;CAClC;AAED,MAAM,WAAW,cAAe,SAAQ,yBAAyB;IAC/D,OAAO,CACL,MAAM,EAAE,MAAM,EACd,OAAO,EAAE,eAAe,EACxB,WAAW,EAAE,OAAO,GACnB,OAAO,CAAC,SAAS,CAAC,CAAC;IAEtB,gBAAgB,IAAI,MAAM,EAAE,CAAC;CAC9B;AAGD,8BAAsB,sBAAsB;IAC1C,SAAS,CAAC,QAAQ,EAAE,gBAAgB,CAAC;gBAEzB,QAAQ,EAAE,gBAAgB;IAItC,QAAQ,CAAC,OAAO,CACd,MAAM,EAAE,MAAM,EACd,OAAO,EAAE,eAAe,EACxB,WAAW,EAAE,OAAO,GACnB,OAAO,CAAC,SAAS,CAAC;IAErB,gBAAgB,IAAI,MAAM,EAAE;IAI5B,cAAc,CAAC,MAAM,EAAE,MAAM,GAAG,OAAO;CAGxC"}
\ No newline at end of file
+{"version":3,"file":"resolverModule.d.ts","sourceRoot":"","sources":["../src/resolverModule.ts"],"names":[],"mappings":"AAAA,OAAO,KAAK,EAAE,SAAS,EAAE,eAAe,EAAE,MAAM,YAAY,CAAC;AAG7D,OAAO,OAAO,gBAAgB;IAC5B,IAAI,SAAS,IAAI,GAAG,CAAC,cAAc,CAAC,GAAG,OAAO,CAAC,GAAG,CAAC,cAAc,CAAC,CAAC,CAAC;IACpE,OAAO,CACL,MAAM,EAAE,MAAM,EACd,OAAO,CAAC,EAAE,eAAe,EACzB,WAAW,CAAC,EAAE,OAAO,GACpB,OAAO,CAAC,SAAS,CAAC;IACrB,QAAQ,CAAC,QAAQ,EAAE,cAAc,GAAG,IAAI;IACxC,KAAK,IAAI,IAAI;CACd;AAED,MAAM,WAAW,yBAAyB;IACxC,KAAK,QAAQ,EAAE,gBAAgB,OAAE;CAClC;AAED,MAAM,WAAW,cAAe,SAAQ,yBAAyB;IAC/D,OAAO,CACL,MAAM,EAAE,MAAM,EACd,OAAO,EAAE,eAAe,EACxB,WAAW,EAAE,OAAO,GACnB,OAAO,CAAC,SAAS,CAAC,CAAC;IAEtB,gBAAgB,IAAI,MAAM,EAAE,GAAG,OAAO,CAAC,MAAM,EAAE,CAAC,CAAC;CAClD;AAGD,8BAAsB,sBAAsB;IAC1C,SAAS,CAAC,QAAQ,EAAE,gBAAgB,CAAC;gBAEzB,QAAQ,EAAE,gBAAgB;IAItC,QAAQ,CAAC,OAAO,CACd,MAAM,EAAE,MAAM,EACd,OAAO,EAAE,eAAe,EACxB,WAAW,EAAE,OAAO,GACnB,OAAO,CAAC,SAAS,CAAC;IAErB,gBAAgB,IAAI,MAAM,EAAE,GAAG,OAAO,CAAC,MAAM,EAAE,CAAC;IAIhD,cAAc,CAAC,MAAM,EAAE,MAAM,GAAG,OAAO,GAAG,OAAO,CAAC,OAAO,CAAC;CAU3D"}
\ No newline at end of file
diff --git a/dist/resolverModule.js b/dist/resolverModule.js
index 5457c46..bb7dcf4 100644
--- a/dist/resolverModule.js
+++ b/dist/resolverModule.js
@@ -1,4 +1,4 @@
-import { getTld } from "./util.js";
+import { getTld, isPromise } from "./util.js";
 // ts-ignore
 export class AbstractResolverModule {
     resolver;
@@ -9,6 +9,12 @@ export class AbstractResolverModule {
         return [];
     }
     isTldSupported(domain) {
-        return this.getSupportedTlds().includes(getTld(domain));
+        let supported = this.getSupportedTlds();
+        if (isPromise(supported)) {
+            return supported.then((supported) => {
+                return supported.includes(getTld(domain));
+            });
+        }
+        return supported.includes(getTld(domain));
     }
 }