RubyGems Maintainability

RubyGems is a package management framework for Ruby.

A package (also known as a library) contains a set of functionality that can be invoked by a Ruby program, such as reading and parsing an XML file. We call these packages "gems" and RubyGems is a tool to install, create, manage and load these packages in your Ruby environment.

RubyGems is also a client for, a public repository of Gems that allows you to publish a Gem that can be shared and used by other developers. See our guide on publishing a Gem at

Getting Started

Installing and managing a Gem is done through the gem command. To install a Gem such as Nokogiri which lets you read and parse XML in Ruby:

$ gem install nokogiri

RubyGems will download the Nokogiri Gem from and install it into your Ruby environment.

Finally, inside your Ruby program, load the Nokogiri gem and start parsing your XML:

require 'nokogiri'

Nokogiri.XML('<h1>Hello World</h1>')

For more information about how to use RubyGems, see our RubyGems basics guide at


  • RubyGems 2.6 supports Ruby 2.4 or lower.
  • RubyGems 2.7 supports Ruby 2.5 or lower.
  • RubyGems 3.0 supports Ruby 2.3 or later.


RubyGems is already installed in your Ruby environment, you can check the version you have installed by running gem --version in your terminal emulator.

In some cases Ruby & RubyGems may be provided as OS packages. This is not a recommended way to use Ruby & RubyGems. It's better to use a Ruby Version Manager, such as rbenv or chruby. If you still want to use the version provided by your OS package manager, please also use your OS package manager to upgrade rubygems, and disregard any other installation instructions given below.

If you would like to manually install RubyGems:

Install RubyGems by running:

$ ruby setup.rb

For more details and other options, see:

$ ruby setup.rb --help

Upgrading RubyGems

To upgrade to the latest RubyGems, run:

$ gem update --system

See UPGRADING for more details and alternative instructions.


RubyGems uses rdoc for documentation. A compiled set of the docs can be viewed online at rubydoc.

RubyGems also provides a comprehensive set of guides which covers numerous topics such as creating a new gem, security practices and other resources at

Getting Help

Filing Tickets

Got a bug and you're not sure? You're sure you have a bug, but don't know what to do next? In any case, let us know about it! The best place for letting the RubyGems team know about bugs or problems you're having is on the RubyGems issues page at GitHub.

Bundler Compatibility

See for known issues.


Ruby Together pays some RubyGems maintainers for their ongoing work. As a grassroots initiative committed to supporting the critical Ruby infrastructure you rely on, Ruby Together is funded entirely by the Ruby community. Contribute today as an individual or even better, as a company, and ensure that RubyGems, Bundler, and other shared tooling is around for years to come.


If you'd like to contribute to RubyGems, that's awesome, and we <3 you. Check out our guide to contributing for more information.

While some RubyGems contributors are compensated by Ruby Together, the project maintainers make decisions independent of Ruby Together. As a project, we welcome contributions regardless of the author’s affiliation with Ruby Together.

Code of Conduct

Everyone interacting in the RubyGems project’s codebases, issue trackers, chat rooms, and mailing lists is expected to follow the contributor code of conduct.