diff --git a/setup.cfg b/setup.cfg
index e1de34c..1938cf6 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -73,7 +73,7 @@ dev =
     pre-commit~=3.3.3
     sphinx~=3.2.1
     sphinx-rtd-theme~=0.5.0
-    tox~=4.11.0
+    tox>=4.11,<4.22
     types-setuptools~=68.1.0.0
     Jinja2<3.1