diff --git a/apps/history_data/history.py b/apps/history_data/history.py
index bb2eac1..f7e23c7 100644
--- a/apps/history_data/history.py
+++ b/apps/history_data/history.py
@@ -74,7 +74,7 @@ class ChromeHistoryReader(BaseReader):
                 if count >= max_count and max_count > 0:
                     break
 
-                last_visit, url, title, visit_count, typed_count, hidden = row
+                last_visit, url, title, visit_count, typed_count, _hidden = row
 
                 # Create document content with metadata embedded in text
                 doc_content = f"""
diff --git a/packages/leann-core/src/leann/cli.py b/packages/leann-core/src/leann/cli.py
index e9c3e50..2d514e2 100644
--- a/packages/leann-core/src/leann/cli.py
+++ b/packages/leann-core/src/leann/cli.py
@@ -1,6 +1,5 @@
 import argparse
 import asyncio
-import sys
 from pathlib import Path
 from typing import Any, Optional, Union