diff --git a/Dockerfile b/Dockerfile
index 40b767c04e3524f380e84f57dae5a3be4acfc094..ced8f284a39c85d1eafafefdbadae5858c4e51ba 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-From: centos:centos7
+From centos:centos7
 # update your OS
 RUN yum -y update && \
     yum -y install bzip2 && \