Updating and uninstalling Liberty on z/OS
You can use IBM® Installation Manager to update or uninstall the WebSphere® Application Server for z/OS® Liberty offering.
![[17.0.0.3 and later]](../ng_v17003plus.gif)
Java SE 8 is the recommended Java SDK because it provides the latest features and security updates. As an alternative to installing Java SE 8, you can install another supported Java SDK version.
Optional features
Certain features can be added or removed from an installed copy of the WebSphere Application Server for z/OS Liberty offering. These are called optional features. Choose the optional features for each copy of the WebSphere Application Server for z/OS Liberty code according to your needs.
Maintenance
IBM regularly provides updates to the WebSphere Application Server for z/OS Liberty offering to fix defects and add new function. Fix packs contain bundled service to bring WebSphere Application Server for z/OS Liberty up to a new level. Interim fixes provide updates to correct individual defects. See Installing Liberty interim fixes and fix packs on z/OS operating systems .
Uninstalling the offering
You can use IBM Installation Manager to uninstall individual copies of WebSphere Application Server for z/OS Liberty offering code.