diff --git a/roles/ks-core/config/templates/kubesphere-config.yaml.j2 b/roles/ks-core/config/templates/kubesphere-config.yaml.j2
index 8951ebc96..7f6bbde86 100644
--- a/roles/ks-core/config/templates/kubesphere-config.yaml.j2
+++ b/roles/ks-core/config/templates/kubesphere-config.yaml.j2
@@ -157,7 +157,7 @@ data:
 {% if logging.enabled is defined and logging.enabled == true %}
     logging:
 {% if common.es.externalElasticsearchUrl is defined and common.es.externalElasticsearchPort is defined and common.es.externalElasticsearchUrl != "" and common.es.externalElasticsearchPort != "" %}
-      host: {{ common.es.externalElasticsearchProtocol | default(http) }}://{{ common.es.externalElasticsearchUrl }}:{{ common.es.externalElasticsearchPort }}
+      host: {{ common.es.externalElasticsearchProtocol | default('http') }}://{{ common.es.externalElasticsearchUrl }}:{{ common.es.externalElasticsearchPort }}
 {% else %}
       host: http://elasticsearch-logging-data.kubesphere-logging-system.svc:9200
 {% endif %}
@@ -175,7 +175,7 @@ data:
 {% if events.enabled is defined and events.enabled == true %}
     events:
 {% if common.es.externalElasticsearchUrl is defined and common.es.externalElasticsearchPort is defined and common.es.externalElasticsearchUrl != "" and common.es.externalElasticsearchPort != "" %}
-      host: {{ common.es.externalElasticsearchProtocol | default(http) }}://{{ common.es.externalElasticsearchUrl }}:{{ common.es.externalElasticsearchPort }}
+      host: {{ common.es.externalElasticsearchProtocol | default('http') }}://{{ common.es.externalElasticsearchUrl }}:{{ common.es.externalElasticsearchPort }}
 {% else %}
       host: http://elasticsearch-logging-data.kubesphere-logging-system.svc:9200
 {% endif %}
@@ -191,7 +191,7 @@ data:
       enable: true
       webhookURL: https://kube-auditing-webhook-svc.kubesphere-logging-system.svc:6443/audit/webhook/event
 {% if common.es.externalElasticsearchUrl is defined and common.es.externalElasticsearchPort is defined and common.es.externalElasticsearchUrl != "" and common.es.externalElasticsearchPort != "" %}
-      host: {{ common.es.externalElasticsearchProtocol | default(http) }}://{{ common.es.externalElasticsearchUrl }}:{{ common.es.externalElasticsearchPort }}
+      host: {{ common.es.externalElasticsearchProtocol | default('http') }}://{{ common.es.externalElasticsearchUrl }}:{{ common.es.externalElasticsearchPort }}
 {% else %}
       host: http://elasticsearch-logging-data.kubesphere-logging-system.svc:9200
 {% endif %}