diff --git a/src/main/webapp/WEB-INF/web.xml b/src/main/webapp/WEB-INF/web.xml
index bd9334e..cbadd8a 100644
--- a/src/main/webapp/WEB-INF/web.xml
+++ b/src/main/webapp/WEB-INF/web.xml
@@ -50,8 +50,8 @@
   <listener>
     <listener-class>biz.redsoft.ncore.dx.init.DxInitializationListener</listener-class>
   </listener>
-<!--  <listener>-->
+  <listener>
     <!-- <listener-class>biz.redsoft.ncore_vaadin.client.vaadin.VaadinSessionListener</listener-class> -->
     <!-- <listener-class>biz.redsoft.ncore_vaadinflow.client.vaadin.VaadinSessionListener</listener-class> -->
-<!--  </listener>-->
+  </listener>
 </web-app>