Today we are discussing a few major changes that will require updating and how we can do those changes. Let's first understand the need for upgradation to a higher version, the older version had some methods that were deprecated one of them including "DRL File" which was arguably the most important file of all the rules were written to it, in the newer version there are changes with the library in place of DRS File. The newer version is faster and better for developers to develop new software using this technology. Let's start : 1.) pom.xml file changes In the properties section of the pom.xml file, we define the version of OptaPlannar that we need to implement. I'm using OptaPlanner 8.35.0.Final, the most recent version. The updated versions now require Java 11 or above.