[rules-users] javassist problem

Hello. I have a question about *javassist.jar* library. Is there any reason that Drools 5.0 and Drools 5.1 are using javassist.jar library version *3.4*? 3.4 version is quite old (the newest version on javassist website is 3.11). Can I change this library to other version than 3.4 (I would like to change it to 3.8 version)? Maybe there is a reason to keep 3.4 version into Drools? I have problem with JBoss and javassist which I described here: http://community.jboss.org/thread/149516 Unfortunately nobody answered. Regards, Piotr