You've used Composer so many times now, but how deep is your understanding of your dependencies? Can you get yourself out of every tricky situation? This talk will cover a broad range of dependency management subjects: From assessing the risk, e.g. through BC breaks, introduced into your business critical code by third party software, all the way to hand-on tips for working with composer in the real world, e.g. what to do if composer.lock conflicts during a merge, when your colleagues and you modified dependencies in different ways.