diff --git a/src/easy_tdx/web/app.py b/src/easy_tdx/web/app.py
index e047d3e..a5c4803 100644
--- a/src/easy_tdx/web/app.py
+++ b/src/easy_tdx/web/app.py
@@ -5,6 +5,7 @@ from __future__ import annotations
 import logging
 from collections.abc import AsyncGenerator
 from contextlib import asynccontextmanager
+from typing import Any
 
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
@@ -102,9 +103,20 @@ def _create_app(
         description="通达信行情数据 REST + WebSocket API",
         version="1.0.0",
         lifespan=lifespan,
-        redoc_js_url="https://cdn.jsdelivr.net/npm/redoc@3.0.0-rc.0/bundle/redoc.js",
+        redoc_url=None,  # 手动注册 redoc 端点以控制 JS CDN URL
     )
 
+    # 手动注册 ReDoc 端点，使用固定版本的 JS（默认 redoc@next 已 404）
+    from fastapi.openapi.docs import get_redoc_html
+
+    @app.get("/redoc", include_in_schema=False)
+    async def redoc_html() -> Any:
+        return get_redoc_html(
+            openapi_url=app.openapi_url or "/openapi.json",
+            title=app.title + " - ReDoc",
+            redoc_js_url="https://cdn.jsdelivr.net/npm/redoc@3.0.0-rc.0/bundle/redoc.js",
+        )
+
     # Store connection config in app.state for lifespan to use
     app.state.tdx_host = host
     app.state.tdx_port = port