diff --git a/requirements/test.txt b/requirements/test.txt
index 563c7cf..2d16205 100644
--- a/requirements/test.txt
+++ b/requirements/test.txt
@@ -1,7 +1,7 @@
 -r base.txt
 
 # Multi-environment testing
-tox ==4.15.0
+tox ==4.23.2
 
 # Wonderful py.test for testing
 pytest >=3.6.0