diff --git a/Dockerfile b/Dockerfile
index 8f75434..e7664c7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,12 @@
-ENV TZ=Asia/Shanghai
 ARG ALPINE_VERSION=3.21
 FROM alpine:${ALPINE_VERSION}
+ENV TZ=Asia/Shanghai
 LABEL Maintainer="Tim de Pater <code@trafex.nl>"
 LABEL Description="Lightweight container with Nginx 1.26 & PHP 8.4 based on Alpine Linux."
+
+# 重新声明ARG变量，使其在FROM之后的阶段可用
+ARG ALPINE_VERSION
+
 # Setup document root
 WORKDIR /var/www/html