diff --git a/pyproject.toml b/pyproject.toml
index e1de326..8b96709 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -55,7 +55,7 @@ dev = [
     "pre-commit == 3.8.0 ; python_version >= '3.9'",
     "pytest == 8.3.2",
     "pytest-cov == 5.0.0",
-    "tox == 4.18.0",
+    "tox == 4.18.1",
 ]
 # Docs are always built on Py3.12; see RTD and tox config files.
 docs = [