diff --git a/package/Dockerfile b/package/Dockerfile
index f78531f..95c6e9a 100644
--- a/package/Dockerfile
+++ b/package/Dockerfile
@@ -1,5 +1,6 @@
 FROM alpine:3
-RUN apk add tzdata && cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && echo "Asia/Shanghai" > /etc/timezone && apk del tzdata
+RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/g' /etc/apk/repositories && \
+    apk add tzdata && cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && echo "Asia/Shanghai" > /etc/timezone && apk del tzdata
 COPY bin/pdf-sender /pdf-sender
 COPY package/init.yml /etc/pdf-sender.yml
 ENTRYPOINT ["/pdf-sender"]