diff --git a/requirements-dev.txt b/requirements-dev.txt
index c5c78ce..3ac9c8b 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -3,5 +3,5 @@
 
 # Additional requirements for development
 sphinx==8.0.2
-tox==4.17.1
+tox==4.21.2
 setuptools==72.1.0