[dasil003]

For completeness it's also worth mentioning that gem 'rails', '~> 3.2.0' may not necessarily update Rails to the latest version when you run `bundle update rails`. The reason is if there is another gem which requires a gem that does not match the requirement of the latest version of Rails, it will backtrack until it finds a compatible version across the board.

So you will want to double-check the specific version that you end up with. If it doesn't work you probably can fix it with `bundle update rails something_else`, unless you have a true conflict in which case you will have to do some spelunking yourself, and perhaps the Rails hotfix should be in place in your app first.