title: Upgrade JBoss 5.1 from EL 2.1 to EL 2.2?
body: <p>This question is quick and simple.</p>
  
  <p>JBoss 5.1 comes out of box supporting JSP and EL (Expression Language) 2.1 and Servlet 2.5.</p>
  
  <p>Is it possible to upgrade or hack this to use EL 2.2?</p>
  
  <p>UPDATE:</p>
  
  <p>I tried what BalusC's answer stated and got the following error:</p>
  
  <blockquote>
    <p>2011-08-01 10:29:52,418 SEVERE [javax.enterprise.resource.webcontainer.jsf.config] (main) Unable to instantiate ExpressionFactory 'org.jboss.el.ExpressionFactoryImpl'
    2011-08-01 10:29:52,441 SEVERE [javax.enterprise.resource.webcontainer.jsf.config] (main) Critical error during deployment: 
    com.sun.faces.config.ConfigurationException: It appears the JSP version of the container is older than 2.1 and unable to locate the EL RI expression factory, com.sun.el.ExpressionFactoryImpl.  If not using JSP or the EL RI, make sure the context initialization parameter, com.sun.faces.expressionFactory, is properly set.</p>
  </blockquote>
  
  <p>I am not sure what this means or how to get around it.  Why does it think there is a JSP version below 2.1?</p>