diff --git a/docker-compose.yml b/docker-compose.yml
index 3b5b63e..f529721 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -24,6 +24,7 @@ services:
       - "8000:8000"
     environment:
       DATABASE_URL: postgresql+asyncpg://drgraph:yingping@db:5432/th_agenter
+      LANGGRAPH_PG_URL: postgresql://drgraph:yingping@db:5432/th_agenter
     volumes:
       - ./data/uploads:/app/data/uploads
       - ./data/chroma:/app/data/chroma