diff --git a/Dockerfile b/Dockerfile
index 57bf8bc..65ca50f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,16 +1,9 @@
-# how to build?
-# docker login
-## .....input your docker id and password
-#docker build . -t tinyfilemanager/tinyfilemanager:master
-#docker push tinyfilemanager/tinyfilemanager:master
-
 # how to use?
 # docker run -d -v /absolute/path:/var/www/html/data -p 80:80 --restart=always --name tinyfilemanager tinyfilemanager/tinyfilemanager:master
 
-FROM php:8.3.26-cli-alpine3.21
+FROM php:8.3.26-cli-alpine
 
-# if run in China
-# RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/g' /etc/apk/repositories
+RUN apk update && apk upgrade --no-cache
 
 RUN apk add --no-cache \
     libzip-dev \