diff --git a/pyproject.toml b/pyproject.toml
index efc9ae5..9def976 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,7 +17,7 @@ dependencies = [
 [project.optional-dependencies]
 dev = [
     "pytest>=9.1.1",
-    "ruff>=0.15.20",
+    "ruff>=0.15.21",
     "click>=8.4.2",
 ]