this package seems to have new commits in its VCS but has
not yet updated debian/changelog. You should consider updating
the Debian changelog and uploading this new version into the archive.
Here are the relevant commit logs:
Author: Jelmer Vernooĳ <firstname.lastname@example.org>
Date: Mon Sep 17 15:16:10 2018 +0100
Add -b flag for debian/master branch.