diff --git a/setup.cfg b/setup.cfg
index 78a3083..43cf841 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -39,7 +39,7 @@ install_requires =
 tests_require =
     pytest
     pytest-django
-    tox
+    tox==4.15.0
     isort
     black
     flake8
@@ -53,7 +53,7 @@ include =
 tests =
     pytest
     pytest-django
-    tox
+    tox==4.15.0
     isort
     black
     flake8