diff --git a/debian/changelog b/debian/changelog
index fcf55b7..1313141 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -6,6 +6,10 @@ dh-di (11) UNRELEASED; urgency=medium
   [ Colin Watson ]
   * Add "Provides: dh-sequence-d-i".
 
+  [ Debian Janitor ]
+  * Bump debhelper from deprecated 9 to 12.
+  * Set debhelper-compat version in Build-Depends.
+
  -- Holger Wansing <hwansing@mailbox.org>  Sun, 13 Oct 2019 16:36:48 +0200
 
 dh-di (10) unstable; urgency=medium
diff --git a/debian/compat b/debian/compat
deleted file mode 100644
index ec63514..0000000
--- a/debian/compat
+++ /dev/null
@@ -1 +0,0 @@
-9
diff --git a/debian/control b/debian/control
index f0ffa8f..b66692b 100644
--- a/debian/control
+++ b/debian/control
@@ -3,7 +3,7 @@ Section: devel
 Priority: optional
 Maintainer: Debian Install System Team <debian-boot@lists.debian.org>
 Uploaders: Colin Watson <cjwatson@debian.org>
-Build-Depends: debhelper (>= 9), perl (>= 5.6.0-16)
+Build-Depends: debhelper-compat (= 12), perl (>= 5.6.0-16)
 Standards-Version: 3.9.6
 Vcs-Browser: https://salsa.debian.org/installer-team/dh-di
 Vcs-Git: https://salsa.debian.org/installer-team/dh-di.git