Rails : 4.2.1 Ruby : 2.2 Mongoid : 4.0.2 getting this error when trying to bundle Bundler could not find compatible versions for gem "sass-rails": In snapshot (Gemfile.lock): sass-rails (5.0.1) In Gemfile: activeadmin-mongoid (>= 0) ruby depends on sass-rails (< 5.0, >= 3.1.4) ruby