Skip to content


Subversion checkout URL

You can clone with
Download ZIP
Manage your application's gem dependencies with less pain
Pull request Compare This branch is 1127 commits behind bundler:master.
Fetching latest commit...
Cannot retrieve the latest commit at this time.
Failed to load latest commit information.

Version     Build Status Code Climate Inline docs Gittip

Bundler: a gem to bundle gems

Bundler makes sure Ruby applications run the same code on every machine.

It does this by managing the gems that the application depends on. Given a list of gems, it can automatically download and install those gems, as well as any other gems needed by the gems that are listed. Before installing gems, it checks the versions of every gem to make sure that they are compatible, and can all be loaded at the same time. After the gems have been installed, Bundler can help you update some or all of them when new versions become available. Finally, it records the exact versions that have been installed, so that others can install the exact same gems.

Installation and usage

gem install bundler
bundle init
echo "gem 'rails'" >> Gemfile
bundle install
bundle exec rails new myapp

See for the full documentation.


For help with common problems, see ISSUES.

Other questions

To see what has changed in recent versions of Bundler, see the CHANGELOG.

Feel free to chat with the Bundler core team (and many other users) on IRC in the #bundler channel on Freenode, or via email on the Bundler mailing list.


If you'd like to contribute to Bundler, that's awesome, and we <3 you. There's a guide to contributing to Bundler (both code and general help) over in DEVELOPMENT

Support work on Bundler

Bundler is developed entirely by a team of volunteers. If Bundler saves your company time and money, contribute to the Bundler development fund on Gittip. Every dollar goes towards Bundler documentation, outreach, and development.

Something went wrong with that request. Please try again.