diff --git a/ai/slackbot-mcp-client/slack-identity/pyproject.toml b/ai/slackbot-mcp-client/slack-identity/pyproject.toml
index ae5243a..c0e82c0 100644
--- a/ai/slackbot-mcp-client/slack-identity/pyproject.toml
+++ b/ai/slackbot-mcp-client/slack-identity/pyproject.toml
@@ -14,7 +14,7 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
-    "mypy==2.4.0",
+    "mypy==2.4.1",
     "pytest==9.2.0",
     "ruff==0.17.3",
 ]