diff --git a/tox.ini b/tox.ini
index b4ad110..6476311 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py3.8
+envlist = py3.9
 
 [testenv]
 deps = -rrequirements.txt