diff --git a/pyproject.toml b/pyproject.toml
index da614bcf0..85bd98cd4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -59,7 +59,7 @@ lint = [
   "mypy ~= 1.1",
   # NOTE(ww): ruff is under active development, so we pin conservatively here
   # and let Dependabot periodically perform this update.
-  "ruff < 0.1.8",
+  "ruff < 0.1.9",
   "types-requests",
   # TODO(ww): Re-enable once dependency on types-cryptography is dropped.
   # See: https://github.com/python/typeshed/issues/8699