diff --git a/debian/changelog b/debian/changelog
index 2430b73..b68d828 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+java3d (1.5.2+dfsg-18) UNRELEASED; urgency=medium
+
+  * Bump debhelper from old 11 to 13.
+
+ -- Debian Janitor <janitor@jelmer.uk>  Mon, 06 Sep 2021 06:16:42 -0000
+
 java3d (1.5.2+dfsg-17) unstable; urgency=medium
 
   * Team upload.
diff --git a/debian/compat b/debian/compat
index b4de394..b1bd38b 100644
--- a/debian/compat
+++ b/debian/compat
@@ -1 +1 @@
-11
+13
diff --git a/debian/control b/debian/control
index b0804c8..5a1979f 100644
--- a/debian/control
+++ b/debian/control
@@ -8,7 +8,7 @@
  Torsten Werner <twerner@debian.org>
 Build-Depends:
  ant-optional,
- debhelper (>= 11),
+ debhelper (>= 13~),
  default-jdk,
  javahelper,
  libgl1-mesa-dev,