diff --git a/requirements.txt b/requirements.txt
index bdaee01..bf51732 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -281,7 +281,7 @@ tornado==6.4
     # via
     #   -r requirements.in
     #   livereload
-tox==3.28.0
+tox==4.19.0
     # via
     #   -r requirements.in
     #   tox-direct