diff --git a/cluster-update b/cluster-update
index 92d7cca..60f64ff 100644
--- a/cluster-update
+++ b/cluster-update
@@ -1,13 +1,11 @@
 #!/bin/bash
 WORKER_LIST="worker.list"
-apt update
-apt upgrade -y
+./update.sh
 for LINE in $(cat $WORKER_LIST | grep -vE "^#"); do
 	WORKERNAME=`echo $LINE | awk -F"/" '{print $NF}'`
 
 	echo "[worker:$WORKERNAME] Updating..."
-	ssh $WORKERNAME -o "StrictHostKeyChecking no" "bash -s" < apt update
-  ssh $WORKERNAME -o "StrictHostKeyChecking no" "bash -s" < apt upgrade -y
+	ssh $WORKERNAME -o "StrictHostKeyChecking no" "bash -s" < ./update.sh
 
 	echo "[worker:$WORKERNAME] Update is completed."
 done