This version of Lilith requires Java 8 update 66 or higher and will says so if you try to start it with an older version. You can still receive event from previous versions so if your application is still running Java 7 or lower just keep using the 0.9.44 artifacts. Keep in mind that Java SE 7 End of Public Updates has already been reached. It contains an important security fix related to deserialization and lots of small usability enhancements. See http://lilithapp.com/releases/8.0.0.xhtml for detailed release notes. Cheers, Jörn.