diff --git a/release.sh b/release.sh
index fb2af3d98..fec229e27 100755
--- a/release.sh
+++ b/release.sh
@@ -19,7 +19,7 @@ else
 	sed -i "s/__version__ = .*/__version__ = '${version}'/" */__init__.py
 fi
 
-tox -e py37-pypi,flake8 --skip-missing-interpreters
+tox -e py39-pypi,flake8 --skip-missing-interpreters
 
 rm -fr dist/*
 python3 setup.py sdist bdist_wheel