diff --git a/requirements-test.txt b/requirements-test.txt
index 313a9f99..d71ab443 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,4 +1,4 @@
-tox==4.20.0
+tox==4.21.0
 coverage==7.6.1
 ruff==0.6.8
 pillow>=10.4.0