diff --git a/Dockerfile b/Dockerfile
index 0ea5b77..f717575 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -24,6 +24,8 @@ COPY static/html static/html
 RUN rm -f /etc/localtime \
     && ln -sv /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \
     && echo "Asia/Shanghai" > /etc/timezone
+# 【可选优化】ca-certificates 安装也放到了这里，并做了清理，可以减小体积
+RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates && apt-get clean && rm -rf /var/lib/apt/lists/*
 # 在build阶段复制可执行的go二进制文件app
 COPY --from=build /go/release/zyos ./zyos