diff --git a/tox.ini b/tox.ini
index 0c4b4f3..dec0745 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,7 +6,7 @@ envlist =
     flake8
     pylint
     bandit
-    py{27,34,35,36,37,38,py,py3}
+    py{27,34,35,36,37,38,39,py,py3}
     readme
     requirements
     clean