RailsApps/rails-composer — pull request #121 by rodrigozrusso (2013-08-21 11:45:42+00:00)
Title: Adding treatment for rails 4 when using mongoid and mongoid-rspec

Unfortunately when using rails 4 (in my case ruby 2.0.0 too) we need to specify the version of mongoid and mongoid-rspec, but composer.rb is using the default version of both gems.
This is a temporary solution :-/, until the final version of mongoid and mongoid-rspec.