diff --git a/docs/src/pages/premium-themes/onepirate/modules/form/validation.js b/docs/src/pages/premium-themes/onepirate/modules/form/validation.js
index 1d3ab7615b166a..4ce5465f1a30b7 100644
--- a/docs/src/pages/premium-themes/onepirate/modules/form/validation.js
+++ b/docs/src/pages/premium-themes/onepirate/modules/form/validation.js
@@ -1,6 +1,12 @@
-// Simplified method of validator/lib/isEmail
+/**
+ * This is a simplified logic.
+ * Consider using `import isEmail from 'validator/lib/isEmail'` from
+ * https://github.com/validatorjs/validator.js/blob/7376945b4ce028b65955ae57b8fccbbf3fe58467/src/lib/isEmail.js
+ * for a more robust version.
+ */
 function isEmail(string) {
-  const re = /^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEFaa-zA-Z\-0-9]+\.)+[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEFaa-zA-Z]{2,}))$/;
+  const re =
+    /^(([^<>()[\].,;:\s@"]+(\.[^<>()[\].,;:\s@"]+)*)|(".+"))@(([^<>()[\].,;:\s@"]+\.)+[^<>()[\].,;:\s@"]{2,})$/i;
   return re.test(string);
 }
 
diff --git a/docs/src/pages/premium-themes/onepirate/modules/form/validation.ts b/docs/src/pages/premium-themes/onepirate/modules/form/validation.ts
index 0b2afa791ad905..bc7d3d7f555b0f 100644
--- a/docs/src/pages/premium-themes/onepirate/modules/form/validation.ts
+++ b/docs/src/pages/premium-themes/onepirate/modules/form/validation.ts
@@ -1,7 +1,12 @@
-// Simplified method of validator/lib/isEmail
+/**
+ * This is a simplified logic.
+ * Consider using `import isEmail from 'validator/lib/isEmail'` from
+ * https://github.com/validatorjs/validator.js/blob/7376945b4ce028b65955ae57b8fccbbf3fe58467/src/lib/isEmail.js
+ * for a more robust version.
+ */
 function isEmail(string: string) {
   const re =
-    /^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
+    /^(([^<>()[\].,;:\s@"]+(\.[^<>()[\].,;:\s@"]+)*)|(".+"))@(([^<>()[\].,;:\s@"]+\.)+[^<>()[\].,;:\s@"]{2,})$/i;
   return re.test(string);
 }