"hiera --version" returns Hiera 3.3.1 instead of Hiera 5 for Puppet Enterprise 2016.4.5, 2017.1, and 2017.2

When I run hiera --version, I expect to see that Hiera 5 is installed, but it says Hiera 3.3.1 is installed instead. How do I upgrade to Hiera 5? Version and installation information PE version: 20...