diff --git a/pyproject.toml b/pyproject.toml
index 9b72d04..f7d7067 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -66,7 +66,7 @@ dev = [
   # Used only by tests/integration/ — read HAI_API_KEY_TEST when running locally.
   "python-dotenv>=1.2.2,<2",
   "rich>=13,<16",
-  "ruff==0.15.20",
+  "ruff==0.15.21",
   "typer>=0.12,<1",
 ]