diff --git a/pyproject.toml b/pyproject.toml
index 79b32bb..b83aadd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,7 @@ dependencies = [
 [project.optional-dependencies]
 dev = [
     "pytest==8.4.2",
-    "ruff==0.15.8",
+    "ruff==0.15.9",
 ]
 
 [tool.setuptools.packages.find]
diff --git a/requirements.txt b/requirements.txt
index ca86b8b..3f3d49a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,6 +6,6 @@ slack-cli-hooks<1.0.0
 openai==2.30.0
 
 pytest==9.0.2
-ruff==0.15.8
+ruff==0.15.9
 python-dotenv==1.2.1
 slack-cli-hooks<1.0.0