diff --git a/docker/php/Dockerfile b/docker/php/Dockerfile
index 1621da7..cc49dff 100644
--- a/docker/php/Dockerfile
+++ b/docker/php/Dockerfile
@@ -6,6 +6,8 @@ FROM ${COMPOSER_IMAGE} AS composer
 FROM ${PHP_BASE_IMAGE}
 
 RUN set -eux; \
+    # 国内 ECS 访问 deb.debian.org（Fastly）易超时，apt 源切换到阿里云镜像站
+    sed -i 's|deb.debian.org|mirrors.aliyun.com|g' /etc/apt/sources.list; \
     apt-get update && apt-get install -y --no-install-recommends \
         libfreetype6-dev \
         libjpeg62-turbo-dev \