diff --git a/pyproject.toml b/pyproject.toml
index 1ee1f0a..8c8118e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,7 +26,7 @@ classifiers = [
 dynamic = ["version"]
 
 [project.optional-dependencies]
-dev = ["pytest>=7.4.4", "ruff==0.16.8", "ty>=0.0.32", "build"]
+dev = ["pytest>=7.4.4", "ruff==0.16.9", "ty>=0.0.32", "build"]
 
 [tool.ruff]
 line-length = 120