Ask HN: How do you keep up with project dependency updates?

Let's say you're working on a Rails project with an AngularJS front end. You use a gemfile to manage your Rails gem dependencies and you use Bower to manage your AngularJS dependencies.

How do you keep up to date with all the new releases for all of your dependencies? Is there a way to monitor releases of plugins/gems/dependencies so you can be notified when you need to update for bug fixes or feature/performance improvements?