diff --git a/requirements.txt b/requirements.txt
index fa57070..70af0d8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ flake8==3.7.8
 pip==19.3.1
 requests>=2.0.0
 Sphinx==2.2.0
-tox==3.14.0
+tox==3.24.3
 twine==1.15.0
 watchdog==0.9.0
 wheel==0.33.6