diff --git a/pyproject.toml b/pyproject.toml
index 3f4c105..8b45089 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ python = "^3.6"
 black = "^20.8b1"
 coverage = "^5.3.1"
 isort = "^5.8.0"
-tox = "^3.25.1"
+tox = "^4.7.0"
 tox-gh-actions = "^2.9.1"
 
 [build-system]