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: Jongmin Kim <firstname.lastname@example.org>
Date: Fri Apr 19 03:54:06 2019 +0900
d/copyright: Fix the typo in Source
Signed-off-by: Jongmin Kim <email@example.com>