diff --git a/Dockerfile b/Dockerfile
index 99efcbf..e7fc5d6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 # 使用基础镜像库
 FROM alpine:3.8
-RUN echo -e http://mirrors.ustc.edu.cn/alpine/v3.7/main/ >> /etc/apk/repositories
+RUN echo -e http://mirrors.ustc.edu.cn/alpine/v3.7/main/ > /etc/apk/repositories
 
 RUN apk add --no-cache vim nginx python3 uwsgi uwsgi-python3
 RUN apk add --update --upgrade