Starting in ruby 2.6, irb is a gem bundled with ruby, so you can upgrade to the latest version in older rubies: https://github.com/ruby/irb#installation https:/

Starting in ruby 2.6, irb is a gem bundled with ruby, so you can upgrade to the latest version in older rubies: https://github.com/ruby/irb#installation https://github.com/ruby/irb#installation