diff --git a/scripts/install_centos.sh b/scripts/install_centos.sh
index 89ae257bc..61b5ce404 100755
--- a/scripts/install_centos.sh
+++ b/scripts/install_centos.sh
@@ -16,11 +16,14 @@ yum -y install deltarpm
 yum install -y wget curl unzip zip
 
 
-wget -O /tmp/master.zip https://codeload.github.com/midoks/mdserver-web/zip/master
-cd /tmp && unzip /tmp/master.zip
-mv /tmp/mdserver-web-master /www/server/mdserver-web
-rm -rf /tmp/master.zip
-rm -rf /tmp/mdserver-web-master
+
+if [ ! -f '/www/server/mdserver-web' ];then
+	wget -O /tmp/master.zip https://codeload.github.com/midoks/mdserver-web/zip/master
+	cd /tmp && unzip /tmp/master.zip
+	mv /tmp/mdserver-web-master /www/server/mdserver-web
+	rm -rf /tmp/master.zip
+	rm -rf /tmp/mdserver-web-master
+fi 
 
 yum groupinstall -y "Development Tools"
 paces="wget python-devel python-imaging zip unzip openssl openssl-devel gcc libxml2 libxml2-dev libxslt* zlib zlib-devel libjpeg-devel libpng-devel libwebp libwebp-devel freetype freetype-devel lsof pcre pcre-devel vixie-cron crontabs"