diff --git a/build/Dockerfile_app b/build/Dockerfile_app
index 0c47cea..969233e 100644
--- a/build/Dockerfile_app
+++ b/build/Dockerfile_app
@@ -1,8 +1,4 @@
-#FROM docker.io/library/alpine:3.20
-FROM registry.ngaiot.com/local/alpine_3.20_cst:5
-RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/g' /etc/apk/repositories
+FROM registry.ngaiot.com/base-images/alpine_3.20_cst:6
 WORKDIR /app/
-RUN   apk add --no-cache  tzdata
-RUN ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && echo 'Asia/Shanghai' >/etc/timezone
 COPY  *.exe  ./
 CMD ["/app/app.exe"]