diff --git a/dev-requirements.txt b/dev-requirements.txt
index eb1bb54a..049e5959 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -9,6 +9,6 @@ pytest-cov==4.0.0
 sphinx-autobuild==2021.3.14
 sphinx_gallery==0.13.0
 sphinx_rtd_theme==1.2.2
-tox==4.6.3
+tox==4.6.4
 pip>=19.0
 importlib-resources==6.0.0