diff --git a/offline-backend-20260512/backend/config.yaml b/offline-backend-20260512/backend/config.yaml
index 4f1c6569..f2971f53 100644
--- a/offline-backend-20260512/backend/config.yaml
+++ b/offline-backend-20260512/backend/config.yaml
@@ -14,7 +14,7 @@ models:
     display_name: DeepSeek Chat
     use: langchain_openai:ChatOpenAI
     model: deepseek-chat
-    api_key: sk-3fee562f834a4c08bb0d471ef44cb445
+    api_key: sk-35345154983047aba9e12faa86c5f62c
     base_url: https://api.deepseek.com
     request_timeout: 600.0
     max_retries: 2