diff --git a/addons/website_event/views/website_event.xml b/addons/website_event/views/website_event.xml
index b90747a56ae..7ebcb5900df 100644
--- a/addons/website_event/views/website_event.xml
+++ b/addons/website_event/views/website_event.xml
@@ -449,7 +449,7 @@
                         <h4 class="modal-title" id="myModalLabel"><strong>Attendees</strong></h4>
                     </div>
                     <div class="modal-body">
-                        <div class="">
+                        <div class="container">
                             <t t-set="counter_type" t-value="1"/>
                             <t t-set="counter" t-value="0"/>
                             <t t-foreach="tickets" t-as="ticket">