diff --git a/requirements_dev.txt b/requirements_dev.txt
index e0fbacf4c0..5cbd655f2a 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -10,7 +10,7 @@ pytest-vcr==1.0.2
 responses==0.12.1
 Sphinx==3.3.1
 testfixtures==6.15.0
-tox==3.20.1
+tox==4.3.5
 twine==3.2.0
 typeguard==2.10.0
 vcrpy==4.1.1