diff --git a/Dockerfile b/Dockerfile
index 7d98b8e..8dfdb98 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM daocloud.io/yexuejc/docker-centos7
+FROM daocloud.io/yexuejc/docker-centos7:master
 RUN yum -y install httpd; yum clean all; systemctl enable httpd.service
 EXPOSE 22
 CMD ["/usr/sbin/init"]
\ No newline at end of file