diff --git a/requirements.txt b/requirements.txt
index b5fae12..1685b4e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,4 @@
 -r requirements-qa.txt
 -r requirements-test.txt
 sphinx_rtd_theme==1.2.2
-tox==4.6.3
+tox==4.6.4