diff --git a/claude-agent-sdk/pyproject.toml b/claude-agent-sdk/pyproject.toml
index d96e3c6..57dec7e 100644
--- a/claude-agent-sdk/pyproject.toml
+++ b/claude-agent-sdk/pyproject.toml
@@ -18,7 +18,7 @@ test = [
 ]
 dev = [
     "bolt-python-support-agent-claude[test]",
-    "ruff==0.15.17",
+    "ruff==0.15.19",
 ]
 
 [tool.setuptools.packages.find]
diff --git a/claude-agent-sdk/requirements.txt b/claude-agent-sdk/requirements.txt
index 9d02701..77b658a 100644
--- a/claude-agent-sdk/requirements.txt
+++ b/claude-agent-sdk/requirements.txt
@@ -6,4 +6,4 @@ aiohttp>=3.14.1
 python-dotenv==1.2.2
 
 pytest
-ruff==0.15.17
+ruff==0.15.19