diff --git a/requirements_dev.txt b/requirements_dev.txt
index fe5a5f8..ac1390f 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,6 +4,6 @@
 pip==21.0.1
 pytest==6.2.2
 Sphinx==3.4.3
-tox==3.21.3
+tox==3.22.0
 twine==3.3.0
 wheel==0.36.2