diff --git a/ks.cfg b/ks.cfg
index d302bef..45dfc30 100644
--- a/ks.cfg
+++ b/ks.cfg
@@ -39,8 +39,6 @@ kernel-headers
 %end
 
 %post
-yum update -y
-
 # disable unnecessary services
 chkconfig acpid off
 chkconfig auditd off
@@ -68,6 +66,4 @@ echo "vagrant" | passwd --stdin vagrant
 yum install -y sudo
 echo "vagrant        ALL=(ALL)       NOPASSWD: ALL" >> /etc/sudoers.d/vagrant
 sed -i "s/^.*requiretty/#Defaults requiretty/" /etc/sudoers
-
-yum clean all
 %end