diff --git a/pyproject.toml b/pyproject.toml
index 53825e1..e39549b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -46,7 +46,7 @@ dev = [
     "mypy~=1.3",
     "pylint~=2.17.4",
     "pytest~=7.4.0",
-    "tox~=4.8.0",
+    "tox~=4.9.0",
 ]
 
 [tool.pytest.ini_options]