diff --git a/common/http_client.py b/common/http_client.py
index f9c0de2b4..5c633d78d 100644
--- a/common/http_client.py
+++ b/common/http_client.py
@@ -82,7 +82,8 @@ def _is_sensitive_url(url: str) -> bool:
     try:
         if settings.GITHUB_OAUTH is not None:
             url_val = settings.GITHUB_OAUTH.get("url")
-            if url_val: oauth_urls.add(url_val)
+            if url_val:
+                oauth_urls.add(url_val)
     except Exception:
         pass
     # Feishu OAuth endpoints
@@ -90,7 +91,8 @@ def _is_sensitive_url(url: str) -> bool:
         if settings.FEISHU_OAUTH is not None:
             for k in ("app_access_token_url", "user_access_token_url"):
                 url_val = settings.FEISHU_OAUTH.get(k)
-                if url_val: oauth_urls.add(url_val)
+                if url_val:
+                    oauth_urls.add(url_val)
     except Exception:
         pass
     # Defensive normalization: compare only scheme+netloc+path
diff --git a/graphrag/search.py b/graphrag/search.py
index c21a0d827..860c58906 100644
--- a/graphrag/search.py
+++ b/graphrag/search.py
@@ -13,7 +13,6 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 #
-import asyncio
 import json
 import logging
 from collections import defaultdict