diff --git a/tox.ini b/tox.ini
index d045e6f..0b33446 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 3.1.1
-envlist = pep8,py36,py38
+envlist = pep8,py36,py39
 skipsdist = True
 ignore_basepython_conflict = True