diff --git a/charts/cronjob-ldap-group-sync-secure/templates/cronjob.yaml b/charts/cronjob-ldap-group-sync-secure/templates/cronjob.yaml
index 43be0f7..5989fb5 100644
--- a/charts/cronjob-ldap-group-sync-secure/templates/cronjob.yaml
+++ b/charts/cronjob-ldap-group-sync-secure/templates/cronjob.yaml
@@ -44,5 +44,5 @@ spec:
           - name: ldap-bind-password
             secret:
               secretName: {{ .Values.ldap_bind_password_secret }}
-  schedule: {{ .Values.schedule }}
+  schedule: {{ .Values.schedule | quote }}
   successfulJobsHistoryLimit: {{ .Values.success_jobs_history_limit }}