diff --git a/requirements_dev.txt b/requirements_dev.txt
index 7d643cb..88dc3ca 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,7 +4,7 @@ wheel==0.37.1
 watchdog==2.1.6
 flake8==4.0.1
 pylint==2.12.2
-tox==3.24.5
+tox==4.21.2
 coverage==6.2
 Sphinx==4.4.0
 twine==3.7.1