Mailman plugin on CentOS

What is the correct way to install the Mailman plugin using Centos. The download on the webmin site is an older version (6.1) of the plugin. I tried yum install webmin-virtualmin-mailman but it's not found. I see the version on GitHub is at 6.7. My 6.1 version when I click to manage my list gives me an error saying there was a bug. I searched and there is a fix that was committed on Dec 26 that is supposed to fix this issue.