diff --git a/debian/compat b/debian/compat
index 7f8f011..ec63514 100644
--- a/debian/compat
+++ b/debian/compat
@@ -1 +1 @@
-7
+9
diff --git a/debian/control b/debian/control
index 719a06e..9aea4ce 100644
--- a/debian/control
+++ b/debian/control
@@ -2,7 +2,7 @@ Source: relational
 Section: math
 Priority: optional
 Maintainer: Salvo 'LtWorf' Tomaselli <tiposchi@tiscali.it>
-Build-Depends: debhelper (>= 7.0.50~), python3, dh-python, python3-xtermcolor
+Build-Depends: debhelper (>= 9), python3, dh-python, python3-xtermcolor
 Standards-Version: 3.9.6
 Homepage: http://ltworf.github.io/relational/