diff --git a/pyproject.toml b/pyproject.toml
index 053290f44..3b874fb28 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -74,7 +74,7 @@ optional-dependencies.dev = [
     "python-dotenv==1.0.1",
     "pyyaml==6.0.1",
     "requests-mock-flask==2023.5.14",
-    "ruff==0.4.8",
+    "ruff==0.4.9",
     "sphinx==7.3.7",
     "sphinx-paramlinks==0.6",
     "sphinx-prompt==1.8",