diff --git a/debian/control b/debian/control
index 59d6589..807790a 100644
--- a/debian/control
+++ b/debian/control
@@ -17,7 +17,7 @@ Build-Depends: debhelper (>= 9),
                python3-requests,
                python3-setuptools,
                python3-six,
-               python3-mock
+               python3-mock,
                python3-tz
 Standards-Version: 3.9.1
 X-Python-Version: >= 2.7