diff --git a/components/Account.php b/components/Account.php
index fb22eca..50038cd 100644
--- a/components/Account.php
+++ b/components/Account.php
@@ -287,6 +287,7 @@ public function onRegister()
             }
 
             $rules = (new UserModel)->rules;
+            $rules['email'] = 'required|between:6,255|email';
 
             if ($this->loginAttribute() !== UserSettings::LOGIN_USERNAME) {
                 unset($rules['username']);