In https://pagure.io/pagure-importer/blob/master/f/requirements.txt all the versions are specified. This means, pagure-imported won't work on an older version of libpagure or requests or PyGithub.

Are you aware of such incompatibilities?

If not I would encourage to drop the versions, they bring little and actually limit the usage of your tool (what if I have a newer requests, should I downgrade it?) unless you know that for some versions things will break.