diff --git a/debian/changelog b/debian/changelog
index 4dfa4f6..39b6c84 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -2,6 +2,7 @@
 
   * Trim trailing whitespace.
   * Update watch file format version to 4.
+  * Set debhelper-compat version in Build-Depends.
 
  -- Debian Janitor <janitor@jelmer.uk>  Wed, 23 Jun 2021 10:46:26 -0000
 
diff --git a/debian/compat b/debian/compat
deleted file mode 100644
index 48082f7..0000000
--- a/debian/compat
+++ /dev/null
@@ -1 +0,0 @@
-12
diff --git a/debian/control b/debian/control
index 893cedf..c8460b7 100644
--- a/debian/control
+++ b/debian/control
@@ -3,7 +3,7 @@
 Priority: optional
 Maintainer: Debian Science Maintainers <debian-science-maintainers@lists.alioth.debian.org>
 Uploaders: Sebastien Delafond <seb@debian.org>
-Build-Depends: debhelper (>= 12), dh-python, python3-setuptools, python3-all, python3-pytest-runner, python3-pytest, python3-mock
+Build-Depends: debhelper-compat (= 12), dh-python, python3-setuptools, python3-all, python3-pytest-runner, python3-pytest, python3-mock
 Standards-Version: 4.5.0
 Homepage: https://github.com/DiamondLightSource/python-procrunner
 Vcs-Browser: https://salsa.debian.org/science-team/python-procrunner