diff --git a/rag-worker/api_client.py b/rag-worker/api_client.py
index d3758e5..56f5ed0 100644
--- a/rag-worker/api_client.py
+++ b/rag-worker/api_client.py
@@ -1,10 +1,10 @@
 from __future__ import annotations
 
 import httpx
-from config import API_BASE_URL, RAG_WORKER_SECRET, WORKER_ID
+from config import API_BASE_URL, INTERNAL_API_KEY, WORKER_ID
 
 _auth_headers = {
-    "Authorization": f"Bearer {RAG_WORKER_SECRET}",
+    "x-internal-api-key": INTERNAL_API_KEY,
     "X-Worker-Id": WORKER_ID,
 }
 
diff --git a/rag-worker/config.py b/rag-worker/config.py
index 9c1c632..6ef0083 100644
--- a/rag-worker/config.py
+++ b/rag-worker/config.py
@@ -12,7 +12,7 @@ if _dotenv_path.exists():
 
 # NestJS 内部 API
 API_BASE_URL = os.getenv("API_BASE_URL", "http://127.0.0.1:3000")
-RAG_WORKER_SECRET = os.getenv("RAG_WORKER_SECRET", "")
+INTERNAL_API_KEY = os.getenv("INTERNAL_API_KEY", os.getenv("RAG_WORKER_SECRET", ""))
 
 # SiliconFlow
 SILICONFLOW_API_KEY = os.getenv("SILICONFLOW_API_KEY", "")