diff --git a/apps/portlet/src/main/webapp/WEB-INF/web.xml b/apps/portlet/src/main/webapp/WEB-INF/web.xml
index f42441989..c95c0af07 100644
--- a/apps/portlet/src/main/webapp/WEB-INF/web.xml
+++ b/apps/portlet/src/main/webapp/WEB-INF/web.xml
@@ -1,6 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
-<web-app id="StrutsPortlet">
+<web-app
+    xmlns="http://java.sun.com/xml/ns/javaee"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
+    version="2.5"
+    id="StrutsPortlet">
 
     <context-param>
         <param-name>org.apache.tiles.factory.TilesContainerFactory</param-name>