Requirements too specific?

[wmvanvliet]

The install requirements of this package state very specific versions for various packages:

    install_requires=['numpy>=1.3.0',
                      'statsmodels==0.8.0',
                      'patsy==0.5.1',
                      'nipype',
                      'configparser',
                      "pandas==0.23.4",
                      "xlwt",
                      'networkx==1.9',
                      "matplotlib==2.2.3",
                      "bctpy"]

Is it really necessary that the user has these specfic versions installed? If not, better to relax the version requirements, as this will cause pip to either freak out or overwrite whatever version the user already had.