diff --git a/ai/slackbot-mcp-client/slack-identity/requirements.txt b/ai/slackbot-mcp-client/slack-identity/requirements.txt
index c26e03f..cb93b9f 100644
--- a/ai/slackbot-mcp-client/slack-identity/requirements.txt
+++ b/ai/slackbot-mcp-client/slack-identity/requirements.txt
@@ -1,5 +1,5 @@
 httpx2==2.4.0
-mcp==1.27.2
+mcp==1.28.0
 mypy==2.1.0
 pytest==9.1.0
 ruff==0.15.17