bundler Rubygems

Manage your application's gem dependencies with less pain

Bundler: a gem to bundle gems

Bundler is a tool that manages gem dependencies for your ruby application. It takes a gem manifest file and is able to fetch, download, and install the gems and all child dependencies specified in this manifest. It can manage any update to the gem manifest file and update the bundle’s gems accordingly. It also lets you run any ruby code in context of the bundle’s gem environment.

Installation and usage

See gembundler.com for up-to-date installation and usage instructions.


For help with common problems, see ISSUES.


To see what has changed in each version of bundler, starting with 0.9.5, see the CHANGELOG. For information about changes that will happen in the future, see the ROADMAP.

Upgrading from Bundler 0.8 to 0.9 and above


Other questions

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.

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