diff --git a/cluster/ubuntu/download-release.sh b/cluster/ubuntu/download-release.sh
index 6d4d169c320..f22d2e627a6 100755
--- a/cluster/ubuntu/download-release.sh
+++ b/cluster/ubuntu/download-release.sh
@@ -53,7 +53,7 @@ fi
 cp $ETCD/etcd $ETCD/etcdctl binaries/master
 
 # k8s
-KUBE_VERSION=${KUBE_VERSION:-"1.0.6"}
+KUBE_VERSION=${KUBE_VERSION:-"1.1.2"}
 echo "Prepare kubernetes ${KUBE_VERSION} release ..."
 if [ ! -f kubernetes.tar.gz ] ; then
   curl -L https://github.com/GoogleCloudPlatform/kubernetes/releases/download/v${KUBE_VERSION}/kubernetes.tar.gz -o kubernetes.tar.gz
diff --git a/cluster/ubuntu/util.sh b/cluster/ubuntu/util.sh
index 58944715fd2..0eb119101a1 100755
--- a/cluster/ubuntu/util.sh
+++ b/cluster/ubuntu/util.sh
@@ -393,7 +393,7 @@ function provision-master() {
       cp ~/kube/init_scripts/* /etc/init.d/
       
       groupadd -f -r kube-cert
-      \"${PROXY_SETTING}\" ~/kube/make-ca-cert.sh \"${MASTER_IP}\" \"${EXTRA_SANS}\"
+      ${PROXY_SETTING} ~/kube/make-ca-cert.sh \"${MASTER_IP}\" \"${EXTRA_SANS}\"
       mkdir -p /opt/bin/
       cp ~/kube/master/* /opt/bin/
       service etcd start
@@ -502,7 +502,7 @@ function provision-masterandnode() {
       cp ~/kube/init_scripts/* /etc/init.d/
       
       groupadd -f -r kube-cert
-      \"${PROXY_SETTING}\" ~/kube/make-ca-cert.sh \"${MASTER_IP}\" \"${EXTRA_SANS}\"
+      ${PROXY_SETTING} ~/kube/make-ca-cert.sh \"${MASTER_IP}\" \"${EXTRA_SANS}\"
       mkdir -p /opt/bin/ 
       cp ~/kube/master/* /opt/bin/
       cp ~/kube/minion/* /opt/bin/