RubyGems 4.0.1 includes enhancements, bug fixes and documentation and Bundler 4.0.1 includes performance, enhancements and bug fixes. To update to the latest RubyGems you can run: gem update –system [–pre] To update to the latest Bundler you can run: gem install bundler [–pre] bundle update –bundler=4.0.1 RubyGems Release Notes Enhancements: Installs bundler 4.0.1 as a default gem. Bug fixes: Fixed unexpected default bundler installation.