In order to add or change a Python dependency requirement of an OpenStack project, it must first be added to the openstack/requirements repository.
Add it to the 'test-requires' or 'pip-requires' files as appropriate and submit it for review.
The requirement specification should usually include both a lower and upper bound. The lower bound should reflect the oldest known version of the package which has the APIs required. An upper bound should be added based on a package's policy of release versioning with respect to incompatible API changes so that we avoid problems caused a future incompatible release.
Once the change to openstack/requirements has merged, the local pypi mirror will be updated and then the requirements file for the OpenStack project may be updated.