diff --git a/dev-requirements.txt b/dev-requirements.txt
index 6fd955b1..5c5feb9f 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,5 +1,5 @@
 -r tox-requirements.txt
 -r docs-requirements.txt
 yapf==0.30.0
-tox==3.24.5
+tox==4.2.6
 Django