diff --git a/app/forms/concerns/decidim/friendly_signup/registration_form_override.rb b/app/forms/concerns/decidim/friendly_signup/registration_form_override.rb
index 6dc0f3b..c86e8d4 100644
--- a/app/forms/concerns/decidim/friendly_signup/registration_form_override.rb
+++ b/app/forms/concerns/decidim/friendly_signup/registration_form_override.rb
@@ -7,8 +7,9 @@ class RegistrationFormOverride < Decidim::RegistrationForm
 
       private
 
+      EMAIL_REGEX = /\A[^<>"']+@[a-zA-Z0-9\-.]+\.[a-zA-Z]{2,}/
       def no_special_characters_in_email
-        errors.add(:email, :invalid) if email =~ /[<>'"]/
+        errors.add(:email, :invalid) if email =~ EMAIL_REGEX
       end
     end
   end