diff --git a/debian/compat b/debian/compat
deleted file mode 100644
index ec635144f60048986bc560c5576355344005e6e7..0000000000000000000000000000000000000000
--- a/debian/compat
+++ /dev/null
@@ -1 +0,0 @@
-9
diff --git a/debian/control b/debian/control
index e4c3d4dab3d5979bc697cefc5a4980a238cac21c..5ed03444a84612d2b47ea8a8a5bdd221d7423f37 100644
--- a/debian/control
+++ b/debian/control
@@ -3,10 +3,10 @@ Section: science
 Priority: optional
 Maintainer: Debian Astro Team <debian-astro-maintainers@lists.alioth.debian.org>
 Uploaders: Ole Streicher <olebole@debian.org>, Benda Xu <heroxbd@gentoo.org>
-Build-Depends: debhelper (>= 9),
+Build-Depends: debhelper-compat (= 12),
                casacore-tools (>= 2.3.0)
 Standards-Version: 4.0.0
-Homepage: http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html
+Homepage: https://www.ngdc.noaa.gov/IAGA/vmod/igrf.html
 Vcs-Git: https://salsa.debian.org/debian-astro-team/casacore-data-igrf.git
 Vcs-Browser: https://salsa.debian.org/debian-astro-team/casacore-data-igrf
 
diff --git a/debian/copyright b/debian/copyright
index 8c2b8d1b961a2ccb55dff1fbb269f56befe05a78..c29b71e6f315fcab71398b009fb156a62cf8d81a 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -1,4 +1,4 @@
-Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 Upstream-Name:  IGRF
 Source: http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html