Ruby gem: rails
gem install rails -v 2.3.9.pre gem 'rails', '~> 2.3.9.pre' To lock this gem at this specific version, update your Gemfile:
gem 'rails', '2.3.9.pre' Then run:
bundle install Note: This is an older version. Consider upgrading to the latest version (8.1.1) for the newest features and security fixes.