diff --git a/Install-preparations.md b/Install-preparations.md
index d204f40..44d3a27 100644
--- a/Install-preparations.md
+++ b/Install-preparations.md
@@ -15,6 +15,10 @@ apt-get install netcat
 ```
 yum -q -y install  openssl  crontabs  nc  curl
 ```
-
+For centos 5:
+
+```
+yum -q -y install openssl,vixie-cron,nc,curl
+```