diff --git a/pyproject.toml b/pyproject.toml
index e9ac9e03b..af3e506b5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -69,7 +69,7 @@ dev = [
     "pytest-beartype-tests==2026.8.16",
     "pytest-cov==7.1.0",
     "pyyaml==6.0.3",
-    "ruff==0.16.8",
+    "ruff==0.16.9",
     # We add shellcheck-py not only for shell scripts and shell code blocks,
     # but also because having it installed means that ``actionlint-py`` will
     # use it to lint shell commands in GitHub workflow files.