diff --git a/setup.cfg b/setup.cfg
index bb5b64064c..50f53e51a2 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -6,6 +6,7 @@ description-file =
 author = Zuul Team
 author-email = zuul-discuss@lists.zuul-ci.org
 home-page = https://zuul-ci.org/
+python-requires = >=3.5
 classifier =
     Intended Audience :: Information Technology
     Intended Audience :: System Administrators