Ruby gem: activerecord
gem install activerecord -v 3.1.9 gem 'activerecord', '~> 3.1.9' To lock this gem at this specific version, update your Gemfile:
gem 'activerecord', '3.1.9' 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.