pip-tools doesn't solve the problem at all. It will update things to the last up to date version, cascading from package to package.
That doesn't guaranty your setup will work.
Dependency management suppose to create a graph of all requirements, lower and upper versions bound for the runtime and the libs, and find the most up to date combination of those.
If a combination can't be found, it should let you know that either you can't upgrade, or suggest alternative upgrade paths.
pip-tools will just happily upgrade your package and let you with something broken, because it's based on pip which does that. They don't check mutually exclusive dependencies versions, deprecation, runtime compatibility and such. And they don't build a graph of their relations.
