diff --git a/lib/utils.js b/lib/utils.js
index 03c9fe9..f6b8f86 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -13,7 +13,7 @@ if (!globalThis.fetch) {
  * @param {string} value The value to be checked.
  */
 export const isValidDomain = (value) =>
-  /(?:[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?\.)+[a-z0-9][a-z0-9-]{0,61}[a-z0-9]/.test(
+  /^\b((?=[a-z0-9-]{1,63}\.)(xn--)?[a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,63}\b$/.test(
     value
   );