diff --git a/debian/compat b/debian/compat
index ec635144f..48082f72f 100644
--- a/debian/compat
+++ b/debian/compat
@@ -1 +1 @@
-9
+12
diff --git a/debian/control b/debian/control
index d2c037129..d1f9c652c 100644
--- a/debian/control
+++ b/debian/control
@@ -2,8 +2,8 @@ Source: spot
 Section: science
 Priority: optional
 Maintainer: Alexandre Duret-Lutz <adl@lrde.epita.fr>
-Build-Depends: debhelper (>= 9), python3-all-dev, ipython3-notebook | python3-ipykernel, ipython3-notebook | python3-nbconvert, libltdl-dev, dh-python
-Standards-Version: 3.9.6
+Build-Depends: debhelper (>= 12), python3-all-dev, ipython3-notebook | python3-ipykernel, ipython3-notebook | python3-nbconvert, libltdl-dev, dh-python
+Standards-Version: 4.5.1
 Homepage: http://spot.lrde.epita.fr/
 
 Package: spot
diff --git a/debian/rules b/debian/rules
index 60f88c8e4..4a522c0d9 100755
--- a/debian/rules
+++ b/debian/rules
@@ -16,10 +16,9 @@ include /usr/share/dpkg/default.mk
 # package maintainers to append LDFLAGS
 #export DEB_LDFLAGS_MAINT_APPEND = -Wl,--as-needed
 
-
-# main packaging script based on dh7 syntax
+# main packaging script
 %:
-	dh $@ --parallel --with=python3
+	dh $@ --with=python3
 
 # Find the LTO plugin, which we need to pass to ar, nm, and ranlib.
 LTOPLUG := $(shell gcc -v 2>&1 | \