Sorry there is no reference like this for JBoss 4. JBoss 4.x is not built with Maven, so it doesn't have any master POM. JBoss 5 will have a POM that shows all the dependencies used in the build. javassist is the correct groupId. It was changed a couple of times, and the incorrect ones will eventually be put into a legacy repository. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4186424#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...