diff --git a/debian/control b/debian/control
index d8d4a7c..0f3ace8 100644
--- a/debian/control
+++ b/debian/control
@@ -10,8 +10,8 @@ Build-Depends: debhelper (>= 9),
                python-sphinx,
                python3-all,
                python3-setuptools (>= 17.1),
-Build-Depends-Indep: python-unittest2,
-                     python3-unittest2,
+Build-Depends-Indep: python-unittest2 (>= 1.1.0),
+                     python3-unittest2 (>= 1.1.0),
 Standards-Version: 3.9.6
 Vcs-Browser: https://anonscm.debian.org/cgit/openstack/python-funcsigs.git/
 Vcs-Git: https://anonscm.debian.org/git/openstack/python-funcsigs.git