diff --git a/src/easy_tdx/ai/llm.py b/src/easy_tdx/ai/llm.py
index 1ab0f4d..44fc960 100644
--- a/src/easy_tdx/ai/llm.py
+++ b/src/easy_tdx/ai/llm.py
@@ -244,7 +244,8 @@ def _post_json(
     )
     try:
         with urllib.request.urlopen(req, timeout=timeout) as resp:
-            return json.loads(resp.read().decode("utf-8"))
+            data: dict[str, Any] = json.loads(resp.read().decode("utf-8"))
+            return data
     except urllib.error.HTTPError as exc:
         body = exc.read().decode("utf-8", errors="replace")[:500]
         raise LlmError(f"LLM API HTTP {exc.code}: {body}", status=exc.code) from exc
diff --git a/src/easy_tdx/web/llm_history_store.py b/src/easy_tdx/web/llm_history_store.py
index d928416..f6534f3 100644
--- a/src/easy_tdx/web/llm_history_store.py
+++ b/src/easy_tdx/web/llm_history_store.py
@@ -133,7 +133,7 @@ class LlmHistoryStore:
                     rec.end_date,
                 ),
             )
-            rec.id = int(cur.lastrowid)
+            rec.id = cur.lastrowid
         return rec
 
     def list_all(self, limit: int = 50) -> list[LlmHistoryRecord]:
diff --git a/src/easy_tdx/web/routers/llm.py b/src/easy_tdx/web/routers/llm.py
index ef85627..f3ce782 100644
--- a/src/easy_tdx/web/routers/llm.py
+++ b/src/easy_tdx/web/routers/llm.py
@@ -111,7 +111,7 @@ async def get_llm_config() -> dict[str, Any]:
         if preset.needs_key and not cfg.api_key:
             missing.append("api_key")
     except ValueError as exc:
-        resolved = cfg  # type: ignore[assignment]
+        resolved = cfg
         missing = [str(exc)]
     return {
         "config": cfg.to_dict(mask_api_key=True),