diff --git a/ui/src/app/user/user-fieldset.tpl.html b/ui/src/app/user/user-fieldset.tpl.html
index 9ae097f..e02e6a4 100644
--- a/ui/src/app/user/user-fieldset.tpl.html
+++ b/ui/src/app/user/user-fieldset.tpl.html
@@ -30,7 +30,7 @@
<md-input-container class="md-block">
<label translate>user.email</label>
<input required name="email"
- ng-pattern="/^[_a-z0-9]+(\.[_a-z0-9]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,4})$/"
+ ng-pattern='/^(([^<>()\[\]\\.,;:\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,}))$/'
ng-model="user.email">
<div ng-messages="theForm.email.$error">
<div translate ng-message="required">user.email-required</div>
