diff --git a/oci/base/alpine-chart-builder/Dockerfile b/oci/base/alpine-chart-builder/Dockerfile
index 29ac857..c8fcb6b 100644
--- a/oci/base/alpine-chart-builder/Dockerfile
+++ b/oci/base/alpine-chart-builder/Dockerfile
@@ -1,4 +1,4 @@
-alpine:latest
+FROM alpine:latest
 MAINTAINER Haitao Pan manbuzhe2008@gmail.com
 
 ENV VERSION=3.11.1