diff --git a/ai/slackbot-mcp-client/no-auth/requirements.txt b/ai/slackbot-mcp-client/no-auth/requirements.txt
index 13803da..95fdecc 100644
--- a/ai/slackbot-mcp-client/no-auth/requirements.txt
+++ b/ai/slackbot-mcp-client/no-auth/requirements.txt
@@ -2,7 +2,7 @@ httpx2==2.9.1
 mcp==1.28.1
 mypy==2.3.0
 pytest==9.1.1
-ruff==0.15.22
+ruff==0.16.0
 slack_bolt==1.30.0
 slack_cli_hooks==0.3.0
 slack_sdk==3.43.0
diff --git a/ai/slackbot-mcp-client/no-auth/tests/test_app.py b/ai/slackbot-mcp-client/no-auth/tests/test_app.py
index a9c824c..cdd43be 100644
--- a/ai/slackbot-mcp-client/no-auth/tests/test_app.py
+++ b/ai/slackbot-mcp-client/no-auth/tests/test_app.py
@@ -17,7 +17,7 @@
 )
 _mock_auth.start()
 
-from src.app import app  # noqa: E402
+from src.app import app
 
 SIGNING_SECRET = "test_signing_secret"
 
diff --git a/ai/slackbot-mcp-client/rich-responses/mcp-apps/requirements.txt b/ai/slackbot-mcp-client/rich-responses/mcp-apps/requirements.txt
index 13803da..95fdecc 100644
--- a/ai/slackbot-mcp-client/rich-responses/mcp-apps/requirements.txt
+++ b/ai/slackbot-mcp-client/rich-responses/mcp-apps/requirements.txt
@@ -2,7 +2,7 @@ httpx2==2.9.1
 mcp==1.28.1
 mypy==2.3.0
 pytest==9.1.1
-ruff==0.15.22
+ruff==0.16.0
 slack_bolt==1.30.0
 slack_cli_hooks==0.3.0
 slack_sdk==3.43.0
diff --git a/ai/slackbot-mcp-client/rich-responses/mcp-apps/tests/test_app.py b/ai/slackbot-mcp-client/rich-responses/mcp-apps/tests/test_app.py
index 7210e8e..2bdd8ce 100644
--- a/ai/slackbot-mcp-client/rich-responses/mcp-apps/tests/test_app.py
+++ b/ai/slackbot-mcp-client/rich-responses/mcp-apps/tests/test_app.py
@@ -17,7 +17,7 @@
 )
 _mock_auth.start()
 
-from src.app import app  # noqa: E402
+from src.app import app
 
 SIGNING_SECRET = "test_signing_secret"
 
diff --git a/ai/slackbot-mcp-client/slack-identity/requirements.txt b/ai/slackbot-mcp-client/slack-identity/requirements.txt
index 13803da..95fdecc 100644
--- a/ai/slackbot-mcp-client/slack-identity/requirements.txt
+++ b/ai/slackbot-mcp-client/slack-identity/requirements.txt
@@ -2,7 +2,7 @@ httpx2==2.9.1
 mcp==1.28.1
 mypy==2.3.0
 pytest==9.1.1
-ruff==0.15.22
+ruff==0.16.0
 slack_bolt==1.30.0
 slack_cli_hooks==0.3.0
 slack_sdk==3.43.0
diff --git a/ai/slackbot-mcp-client/slack-identity/src/app.py b/ai/slackbot-mcp-client/slack-identity/src/app.py
index a409e62..b2b190b 100644
--- a/ai/slackbot-mcp-client/slack-identity/src/app.py
+++ b/ai/slackbot-mcp-client/slack-identity/src/app.py
@@ -7,6 +7,7 @@
 from slack_bolt import App
 from slack_bolt.adapter.starlette import SlackRequestHandler
 from slack_bolt.oauth.oauth_settings import OAuthSettings
+from slack_sdk.errors import SlackApiError
 from slack_sdk.oauth.installation_store import FileInstallationStore
 from slack_sdk.oauth.state_store import FileOAuthStateStore
 from slack_sdk.signature import SignatureVerifier
@@ -71,7 +72,7 @@ async def get_profile_card(
         profile = (result["user"] or {}).get("profile")
         if not profile:
             raise ValueError("No profile found")
-    except Exception:
+    except (SlackApiError, ValueError, KeyError):
         return CallToolResult(
             content=[
                 TextContent(
diff --git a/ai/slackbot-mcp-client/slack-identity/tests/test_app.py b/ai/slackbot-mcp-client/slack-identity/tests/test_app.py
index f2dcd56..6b2f08c 100644
--- a/ai/slackbot-mcp-client/slack-identity/tests/test_app.py
+++ b/ai/slackbot-mcp-client/slack-identity/tests/test_app.py
@@ -12,7 +12,7 @@
 os.environ["SLACK_CLIENT_ID"] = "111.222"
 os.environ["SLACK_CLIENT_SECRET"] = "client_secret"
 
-from src.app import app  # noqa: E402
+from src.app import app
 
 SIGNING_SECRET = "test_signing_secret"
 TEAM_ID = "T0001"