diff -Nru ppx-tools-versioned-5.2.3/debian/changelog ppx-tools-versioned-5.2.3/debian/changelog
--- ppx-tools-versioned-5.2.3/debian/changelog	2019-08-22 02:38:25.000000000 +0000
+++ ppx-tools-versioned-5.2.3/debian/changelog	2019-11-11 14:45:35.000000000 +0000
@@ -1,3 +1,13 @@
+ppx-tools-versioned (5.2.3-1.1~ubuntu18.04.1~ppa1) bionic; urgency=medium
+
+  [ Andy Li ]
+  * Set d/compat back to 9.
+
+  [ Hawk ]
+  * No-change backport to bionic
+
+ -- Hawk <andy@Hawk.localdomain>  Mon, 11 Nov 2019 22:45:35 +0800
+
 ppx-tools-versioned (5.2.3-1) unstable; urgency=medium
 
   * Team upload
diff -Nru ppx-tools-versioned-5.2.3/debian/compat ppx-tools-versioned-5.2.3/debian/compat
--- ppx-tools-versioned-5.2.3/debian/compat	1970-01-01 00:00:00.000000000 +0000
+++ ppx-tools-versioned-5.2.3/debian/compat	2019-11-11 14:17:09.000000000 +0000
@@ -0,0 +1 @@
+9
\ No newline at end of file
diff -Nru ppx-tools-versioned-5.2.3/debian/control ppx-tools-versioned-5.2.3/debian/control
--- ppx-tools-versioned-5.2.3/debian/control	2019-08-22 02:38:25.000000000 +0000
+++ ppx-tools-versioned-5.2.3/debian/control	2019-11-11 14:16:59.000000000 +0000
@@ -5,7 +5,7 @@
 Uploaders: Andy Li <andy@onthewings.net>
 Standards-Version: 4.4.0
 Build-Depends:
- debhelper-compat (= 12),
+ debhelper (>= 9~),
  ocaml-nox (>= 4.02.0),
  ocaml-dune,
  libmigrate-parsetree-ocaml-dev (>= 1.4.0),