diff --git a/pyproject.toml b/pyproject.toml
index 6441073..d8081a7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -168,7 +168,6 @@ ignore = [
   "E741",     # Ambiguous variable name
   "EM101",    # Exception string literal
   "EM102",    # Exception f-string
-  "F401",     # Unused import
   "F541",     # f-string without placeholders
   "F811",     # Redefinition of unused name
   "F821",     # Undefined name
diff --git a/src/seclab_taskflow_agent/mcp_servers/codeql/jsonrpyc/__init__.py b/src/seclab_taskflow_agent/mcp_servers/codeql/jsonrpyc/__init__.py
index 9a793eb..3dfc593 100644
--- a/src/seclab_taskflow_agent/mcp_servers/codeql/jsonrpyc/__init__.py
+++ b/src/seclab_taskflow_agent/mcp_servers/codeql/jsonrpyc/__init__.py
@@ -3,7 +3,6 @@
 
 __all__: list[str] = []
 
-import io
 import json
 import os
 import re
@@ -11,7 +10,7 @@
 import threading
 import time
 from collections.abc import Callable
-from typing import Any, Optional, Protocol, Type, TypeAlias
+from typing import Any, Protocol, TypeAlias
 
 # package infos
 from .__meta__ import (  # noqa