diff --git a/docker/php/Dockerfile b/docker/php/Dockerfile
index 692ccff..2768a5a 100644
--- a/docker/php/Dockerfile
+++ b/docker/php/Dockerfile
@@ -24,6 +24,9 @@ RUN set -eux; \
 
 COPY --from=${COMPOSER_IMAGE} /usr/bin/composer /usr/bin/composer
 
+# Composer 阿里云镜像（备用，vendor 已提交通常不需要）
+RUN composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/
+
 WORKDIR /var/www/html
 
 COPY swoole.php /tmp/swoole_docker.php