diff --git a/deploy/ansible.yml b/deploy/ansible.yml
index 5413fd494..e7f970025 100644
--- a/deploy/ansible.yml
+++ b/deploy/ansible.yml
@@ -1,5 +1,5 @@
 ---
-- hosts: {{ deploy_hosts }}
+- hosts: "{{ deploy_hosts }}"
   remote_user: ubuntu
   tasks:
     - name: copy execute file to dest