Gemfile in signed_form-0.2.0 vs Gemfile in signed_form-0.5.0

@@ -5,18 +5,12 @@
 
 rails_version = ENV['RAILS_VERSION'] || 'master'
 
 case rails_version
 when /master/
-  gem "rails", github: "rails/rails"
-when /4-0-stable/
-  gem "rails", github: "rails/rails", branch: "4-0-stable"
-when /3-2-stable/
-  gem "rails", github: "rails/rails", branch: "3-2-stable"
-  gem "strong_parameters"
-when /3-1-stable/
-  gem "rails", github: "rails/rails", branch: "3-1-stable"
-  gem "strong_parameters"
+  gem 'rails', github: 'rails/rails'
+  gem 'arel', github: 'rails/arel'
+when /-stable$/
+  gem 'rails', github: 'rails/rails', branch: rails_version
 else
-  gem "rails", ENV['RAILS_VERSION']
-  gem "strong_parameters"
+  gem 'rails', ENV['RAILS_VERSION']
 end