diff --git a/docker-compose.yml b/docker-compose.yml
index 6c51bc7..1c653d4 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -41,7 +41,8 @@ services:
       SECRET_KEY: change-me-in-production
       DEBUG: "true"
       CORS_ORIGINS: '["http://localhost:8010","https://localhost:8010","http://192.168.9.80:8010","https://192.168.9.80:8010","tauri://localhost"]'
-      MOM_DB_HOST: 172.20.0.3
+      # 🚀 MOM 老系统数据库 — 通过容器名解析（projects_default 网络内 DNS），不再写死 IP
+      MOM_DB_HOST: inventory_db
       MOM_DB_PORT: "5432"
     ports:
       - "8011:8000"
@@ -76,7 +77,7 @@ services:
 networks:
   mom_net:
     external: true
-    name: inventory-backend_default
+    name: projects_default
 
 volumes:
   track_pgdata: