appraise "rails40" do
  gem "activerecord", "~> 4.0.0"
  gem 'mysql2', '~> 0.3.10'
end

appraise "rails41" do
  gem "activerecord", "~> 4.1.0"
  gem 'mysql2', '~> 0.3.13'
end

appraise "rails42" do
  gem "activerecord", "~> 4.2.0"
  gem 'mysql2', '~> 0.3.13'
end

appraise "rails50" do
  gem "activerecord", "5.0.0.beta3"
  gem 'mysql2', '>= 0.3.18', '< 0.5'
end