diff --git a/WEB-INF/web.xml b/WEB-INF/web.xml
index 801e577..28fc779 100644
--- a/WEB-INF/web.xml
+++ b/WEB-INF/web.xml
@@ -1,3 +1,4 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE configuration>
 <web-app>
 </web-app>