diff --git a/Dockerfile.tenant b/Dockerfile.tenant
index 08ecfda..238312c 100644
--- a/Dockerfile.tenant
+++ b/Dockerfile.tenant
@@ -31,6 +31,8 @@ RUN cd docs-site && yarn build
 FROM --platform=linux/amd64 nginx:1.27-alpine
 
 ARG SERVICE_VERSION=0.0.0
+# RUN 写文件确保 SERVICE_VERSION 变化时 BuildKit inline cache 失效（LABEL 单独不可靠）
+RUN echo "${SERVICE_VERSION}" > /etc/service_version
 LABEL com.xuqm.version="${SERVICE_VERSION}"
 LABEL com.xuqm.service="tenant-web"