diff --git a/setup_scripts/duckdns.sh b/setup_scripts/duckdns.sh
index 2f5d3ca..de6974c 100644
--- a/setup_scripts/duckdns.sh
+++ b/setup_scripts/duckdns.sh
@@ -6,5 +6,5 @@ touch duck.sh
 echo url="https://www.duckdns.org/update?domains=$1&token=$2&ip=" | curl -k -o ~/duckdns/duck.log -K -
 chmod 700 duck.sh
 sudo touch /var/spool/cron/root
-sudo echo "*/5 * * * * /home/ec2-user/duckdns/duck.sh >/dev/null 2>&1" >> /var/spool/cron/root
+echo "*/5 * * * * /home/ec2-user/duckdns/duck.sh >/dev/null 2>&1" | sudo tee -a /var/spool/cron/root > /dev/null
 ./duck.sh