appraise "rails-4.2" do gem "rails", "~> 4.2.8" gem 'statesman', '~> 1.3' end appraise "rails-5.0" do gem "rails", "~> 5.0.2" gem 'statesman', '~> 2.0' gem 'activemodel-serializers-xml' gem 'rails-controller-testing' gem 'sinatra', '~> 2.0.0.rc2' end