diff --git a/setup.py b/setup.py
index 277a50b5..6b1458fa 100644
--- a/setup.py
+++ b/setup.py
@@ -62,7 +62,7 @@
             # Setup.
             "pre-commit==3.7.0 ; python_version>='3.9'",
             "tox==3.27.1 ; python_version<'3.8'",
-            "tox==4.14.2 ; python_version>='3.8'",
+            "tox==4.15.0 ; python_version>='3.8'",
             # Testing framework.
             "pytest==6.1.2 ; python_version<'3.8'",
             "pytest==8.1.1 ; python_version>='3.8'",