Ruby gem: libxml-ruby
gem install libxml-ruby -v 4.0.0 gem 'libxml-ruby', '~> 4.0.0' To lock this gem at this specific version, update your Gemfile:
gem 'libxml-ruby', '4.0.0' Then run:
bundle install Note: This is an older version. Consider upgrading to the latest version (5.0.5) for the newest features and security fixes.