diff --git a/poetry.lock b/poetry.lock
index c58b0435..adde8e7a 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -2133,4 +2133,4 @@ testing = ["coverage (>=5.0.3)", "zope.event", "zope.testing"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.8"
-content-hash = "d152018176846e8cc5455ec2be0f84c10eece13d18ded0944b950ca77a646124"
+content-hash = "185cf62b29390f4fc38668c61a35ea2ad5d05fd0910019bfd119fc5c8b54c866"
diff --git a/pyproject.toml b/pyproject.toml
index 2706ba0f..805c2dc6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,7 +43,7 @@ rq = "^1.10.1"
 black = "^21.11b1"
 isort = "^5.10.1"
 flake8 = "<7"
-tox = "^3.20.1"
+tox = "^3.20.1 || ^4.0.0"
 pytest = "^7.0.0"
 pytest-black = "^0.3.12"
 pytest-flake8 = "^1.0.7"