diff --git a/pyproject.toml b/pyproject.toml
index ee260af..e12a93d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ mypy = "^1"
 [tool.poetry.dev-dependencies]
 pylint = "*"
 deepdiff = "*"
-tox = "^3"
+tox = "^4"
 black = "*"
 mypy = "^1"