diff --git a/zabbix/agent.yaml b/zabbix/agent.yaml
index 925b556..ea4a984 100644
--- a/zabbix/agent.yaml
+++ b/zabbix/agent.yaml
@@ -1,6 +1,6 @@
 # ansible-playbook -i inventory agent.yaml -u centos --key-file=node.pem -b
 ---
-- hosts: {{ hostvars[hostname].ansible_host }}
+- hosts: "{{ hostvars[hostname].ansible_host }}"
   gather_facts: false
   vars:
     ansible_python_interpreter: /usr/bin/python3