thetron/mongoid-enum — pull request #1 by plainprogrammer (2013-11-10 16:35:08+00:00)
Title: Opened up support for Mongoid 4.0.0.

Mongoid 4.0.0 works with your gem. I wouldn't expect you to pull this in until 4.0.0 is actually released though. Just wanted you to know.