diff --git a/pyproject.toml b/pyproject.toml
index 6b3b164..f70d51b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,7 +22,7 @@ docs = [
 lint = [
     "mypy==2.2.0",
     "pre-commit==4.6.0",
-    "ruff==0.15.20",
+    "ruff==0.15.21",
 ]
 test = [
     "coverage==7.14.3",