diff --git a/requirements_dev_optional.txt b/requirements_dev_optional.txt
index f7088a766b..3478e5fb82 100644
--- a/requirements_dev_optional.txt
+++ b/requirements_dev_optional.txt
@@ -12,7 +12,7 @@ types-redis
 types-setuptools
 pymongo==4.0.2
 # optional test requirements
-tox==3.24.5
+tox==4.16.0
 coverage
 flake8==4.0.1
 pytest-cov==3.0.0