It’s Time to Upgrade OJS | Public Knowledge Project

"We encourage users to upgrade to the current release series OJS 3.3.x! More than 25,000 active journals around the world use Open Journal Systems (OJS). However, the PKP Technical Committee recently learned that many of those journals are relying on considerably older  versions of OJS. As we are regularly releasing upgrades of the software, given changes to the web, staying with older versions may pose problems for a journal’s stability and security . For example, more than 8,000 journals are using OJS 2.4 – a version that PKP has now retired. ..."