diff --git a/debian/control b/debian/control
index 66e5949..591858e 100644
--- a/debian/control
+++ b/debian/control
@@ -19,6 +19,8 @@ Build-Depends: debhelper (>= 10),
                python3-sphinx-rtd-theme,
                python3-tinycss2
 Standards-Version: 4.2.1
+X-Python-Version: >= 2.7
+X-Python3-Version: >= 3.4
 Homepage: https://github.com/Kozea/cssselect2/
 Vcs-Browser: https://salsa.debian.org/python-team/modules/python-cssselect2
 Vcs-Git: https://salsa.debian.org/python-team/modules/python-cssselect2.git