Snippet #633

Bundler’s relatively new "conservative updates" feature allows you to update just one gem in a dependency hierarchy. Example: today Mail 2.2.6 is released, with the note that it is, "a bug fix release mainly, all users of the 2.2 series should definitely update." In order to pull this in to an existing Rails 3 app you just do bundle update mail and it updates that one dependency without touching any of the others.