After reading through Yahuda Katz's blog entry that @maxlinc posted above, I'm inclined to agree that Gemfile.lock should not be checked in. I'm also in agreement that the gems in the Gemfile should have at least some sort of minimal constraints, so I'd be happy to include a pessimistic constraint for the foodcritic dependency like @maxlinc mentioned in this pull request (or I can add that into a separate request).