About change the servlet version from 2.2 to 2.3

[kim lo]

I have change the the servlet version from 2.2 to 2.3 in
web.xml in the web application.

>>> From
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN" "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">

>>> To
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/j2ee/dtds/web-app_2_3.dtd">

I want to know what the other configuration files is/are reuqired to edit , what library I need to add in the web application or what configuration is required to set in WebSphere . The application server is WebSphere 6.5

Thank.