diff --git a/pyproject.toml b/pyproject.toml
index e9546ea..ed2fd62 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ optional-dependencies = { dev = [
     "pre-commit==4.5.1; python_version >= '3.10'",
     "mypy==1.19.1",
     "types-setuptools",
-    "ruff==0.15.8",
+    "ruff==0.15.9",
 ] }
 dynamic = ["version"]