diff --git a/Dockerfile b/Dockerfile
index c80e567..2674965 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,12 +1,13 @@
-FROM php:7.2.34-fpm-alpine3.12
+#FROM php:7.2.34-fpm-alpine3.12
+FROM php:7.4.33-zts-alpine3.15
 
 ENV COMPOSER_ALLOW_SUPERUSER=1 \
     COMPOSER_HOME=/composer \
     COMPOSER_MEMORY_LIMIT=-1
 
 # 使用阿里云 Alpine 3.12 存档源
-RUN echo "https://mirrors.aliyun.com/alpine/v3.12/main" > /etc/apk/repositories \
-    && echo "https://mirrors.aliyun.com/alpine/v3.12/community" >> /etc/apk/repositories
+RUN echo "https://mirrors.aliyun.com/alpine/v3.15/main" > /etc/apk/repositories \
+    && echo "https://mirrors.aliyun.com/alpine/v3.15/community" >> /etc/apk/repositories
 
 # 安装依赖 + 常用扩展
 RUN apk add --no-cache \
@@ -45,4 +46,4 @@ RUN apk add --no-cache \
     && apk del build-base autoconf linux-headers \
     && rm -rf /tmp/pear ~/.pearrc /var/cache/apk/*
 
-WORKDIR /var/www/html
+WORKDIR /www/wwwroot/admin