PMI has announced changes to their certification exams based upon the release of the 6th edition of the PMBoK Guide. In their own words:

"Beginning 26 March 2018, the PMP® exam will reflect content from the PMBOK® Guide – Sixth Edition. Exams administered before 26 March 2018 reflect PMBOK® Guide – Fifth Edition. On 26 March 2018, the PMI-ACP exam will also change to reflect the new Agile Practice Guide."