diff -Nru tryton-modules-purchase-request-6.0.0/debian/changelog tryton-modules-purchase-request-6.0.0/debian/changelog
--- tryton-modules-purchase-request-6.0.0/debian/changelog	2021-10-19 10:13:07.000000000 +0000
+++ tryton-modules-purchase-request-6.0.0/debian/changelog	2021-11-12 20:53:10.000000000 +0000
@@ -1,3 +1,10 @@
+tryton-modules-purchase-request (6.0.0-2) unstable; urgency=medium
+
+  * Use debhelper-compat (=13).
+  * Depend on the tryton-server-api of the same major version.
+
+ -- Mathias Behrle <mathiasb@m9s.biz>  Fri, 12 Nov 2021 21:53:10 +0100
+
 tryton-modules-purchase-request (6.0.0-1) unstable; urgency=medium
 
   * Update year of debian copyright.
diff -Nru tryton-modules-purchase-request-6.0.0/debian/compat tryton-modules-purchase-request-6.0.0/debian/compat
--- tryton-modules-purchase-request-6.0.0/debian/compat	2021-10-19 09:50:42.000000000 +0000
+++ tryton-modules-purchase-request-6.0.0/debian/compat	1970-01-01 00:00:00.000000000 +0000
@@ -1 +0,0 @@
-10
diff -Nru tryton-modules-purchase-request-6.0.0/debian/control tryton-modules-purchase-request-6.0.0/debian/control
--- tryton-modules-purchase-request-6.0.0/debian/control	2021-10-19 09:50:42.000000000 +0000
+++ tryton-modules-purchase-request-6.0.0/debian/control	2021-11-12 20:29:38.000000000 +0000
@@ -3,7 +3,7 @@
 Uploaders: Mathias Behrle <mathiasb@m9s.biz>
 Section: python
 Priority: optional
-Build-Depends: debhelper (>= 11~),
+Build-Depends: debhelper-compat (= 13),
                dh-python,
                python3,
                python3-setuptools
@@ -15,7 +15,8 @@
 
 Package: tryton-modules-purchase-request
 Architecture: all
-Depends: python3-pkg-resources,
+Depends: ${API},
+         python3-pkg-resources,
          tryton-modules-product (>= ${version:major}),
          tryton-modules-purchase (>= ${version:major}),
          tryton-server (>= ${version:major}),
diff -Nru tryton-modules-purchase-request-6.0.0/debian/rules tryton-modules-purchase-request-6.0.0/debian/rules
--- tryton-modules-purchase-request-6.0.0/debian/rules	2021-10-19 08:14:47.000000000 +0000
+++ tryton-modules-purchase-request-6.0.0/debian/rules	2021-11-12 20:31:49.000000000 +0000
@@ -14,4 +14,4 @@
 	dh $@ --with python3 --buildsystem=pybuild
 
 override_dh_gencontrol:
-	dh_gencontrol -- -Vversion:major="$(MAJOR)"
+	dh_gencontrol -- -Vversion:major="$(MAJOR)" -VAPI="tryton-server-api-$(MAJOR)"