diff --git a/tox.ini b/tox.ini
index 160a42c..7812b5a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 3.18.0
-envlist = py37,py39,pep8
+envlist = py3,pep8
 ignore_basepython_conflict = True
 
 [testenv]