diff --git a/zabbix_agent.sh b/zabbix_agent.sh
index e635ca2..9ccbad3 100644
--- a/zabbix_agent.sh
+++ b/zabbix_agent.sh
@@ -27,11 +27,11 @@ apt install zabbix-agent
 # ask for the hostname
 read -e -p "Enter Hostname: " -i "$(cat /etc/hostname)" hostname
 
-sed -i 's/Hostname=Zabbix\ server/Hostname=${hostname}/' /etc/zabbix/zabbix_agentd.conf
+sed -i "s/Hostname=Zabbix\ server/Hostname=${hostname}/" /etc/zabbix/zabbix_agentd.conf
 
-sed -i 's/Server=127.0.0.1/Server=${ZABBIX_SERVER}/' /etc/zabbix/zabbix_agentd.conf
+sed -i "s/Server=127.0.0.1/Server=${ZABBIX_SERVER}/" /etc/zabbix/zabbix_agentd.conf
 
-sed -i 's/ServerActive=127.0.0.1/ServerActive=${ZABBIX_SERVER}/' /etc/zabbix/zabbix_agentd.conf
+sed -i "s/ServerActive=127.0.0.1/ServerActive=${ZABBIX_SERVER}/" /etc/zabbix/zabbix_agentd.conf
 
 systemctl restart zabbix-agent