diff --git a/debian/changelog b/debian/changelog
index 8c80a1e..f009640 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+fontchooser (1.0.0-4) UNRELEASED; urgency=medium
+
+  * Bump debhelper from deprecated 9 to 12.
+
+ -- Debian Janitor <janitor@jelmer.uk>  Fri, 21 May 2021 22:57:18 -0000
+
 fontchooser (1.0.0-3) unstable; urgency=medium
 
   * Team upload.
diff --git a/debian/compat b/debian/compat
index ec63514..48082f7 100644
--- a/debian/compat
+++ b/debian/compat
@@ -1 +1 @@
-9
+12
diff --git a/debian/control b/debian/control
index d143fc9..22b3c37 100644
--- a/debian/control
+++ b/debian/control
@@ -6,7 +6,7 @@
  Andrew Ross <ubuntu@rossfamily.co.uk>
 Build-Depends:
  ant,
- debhelper (>= 9),
+ debhelper (>= 12~),
  default-jdk,
  javahelper
 Standards-Version: 3.9.8