diff --git a/docker-compose.prod.yml b/docker-compose.prod.yml
index 5f2e04a..e555d78 100644
--- a/docker-compose.prod.yml
+++ b/docker-compose.prod.yml
@@ -34,8 +34,9 @@ services:
       context: .
       dockerfile: Dockerfile
       args:
-        # 大陆默认经 DaoCloud；若拉取失败可 export PYTHON_BASE_IMAGE=docker.io/library/python:3.13-slim-bookworm 后 build
-        PYTHON_BASE_IMAGE: ${PYTHON_BASE_IMAGE:-m.daocloud.io/docker.io/library/python:3.13-slim-bookworm}
+        # 与 db 服务一致：docker.m.daocloud.io/library/...（勿用 bare tag 3.13，镜像站常解析失败）
+        # 需直连 Docker Hub 时可 export PYTHON_BASE_IMAGE=docker.io/library/python:3.13-slim-bookworm
+        PYTHON_BASE_IMAGE: ${PYTHON_BASE_IMAGE:-docker.m.daocloud.io/library/python:3.13-slim-bookworm}
     environment:
       POSTGRES_USER: ${POSTGRES_USER:-postgres}
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:?Set POSTGRES_PASSWORD}