1 files changed, 2 insertions, 1 deletions
diff --git a/tox.ini b/tox.ini
index 8a99d6b..c49445a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -47,7 +47,7 @@ envlist =
     # TODO: would like to 'default-pyston' but doesnt quite work
     # TODO: also add default-jython27
     # NOTE: removed 2.6 & 3.3 as of 2019-11, tox+pip no longer work for these versions.
-    default-py{27,34,35,36,37,38,py,py3},
+    default-py{27,34,35,36,37,38,39,py,py3},
 
     # pbkdf2 backend testing
     # NOTE: 'hashlib' takes priority under py34+
@@ -102,6 +102,7 @@ basepython =
     py36: python3.6
     py37: python3.7
     py38: python3.8
+    py39: python3.9
 
     pypy: pypy
     pypy3: pypy3