diff --git a/requirements/dev.txt b/requirements/dev.txt
index 8b7b2f7..a8e2b22 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -4,7 +4,7 @@ mypy~=1.11.2
 pylint==3.3.1
 pytest-cov~=5.0.0
 pytest~=8.3.2
-tox==4.20.0
+tox==4.21.0
 types-ujson~=5.10.0.20240515
 
 # Disabled async libraries for now