diff --git a/tox.ini b/tox.ini
index 358c088..4592b21 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py36,py37
+envlist = py36,py37,py38,py39
 skipsdist = True
 
 [testenv]