diff --git a/templates/configmap-env.yaml b/templates/configmap-env.yaml
index 3ce6ced..f2d989e 100644
--- a/templates/configmap-env.yaml
+++ b/templates/configmap-env.yaml
@@ -39,15 +39,13 @@ data:
   ES_PORT: "9200"
   {{- else if .Values.elasticsearch.hostname }}
   ES_ENABLED: "true"
+  ES_PRESET: {{ .Values.elasticsearch.preset | default "single_node_cluster" | quote }}
   ES_HOST: {{ include "mastodon.elasticsearch.fullHostname" .}}
   ES_PORT: {{ .Values.elasticsearch.port | default "9200" | quote }}
   {{- end }}
   {{- with .Values.elasticsearch.user }}
   ES_USER: {{ . }}
   {{- end }}
-  {{- with .Values.elasticsearch.user }}
-  ES_USER: {{ . }}
-  {{- end }}
   LOCAL_DOMAIN: {{ .Values.mastodon.local_domain }}
   {{- with .Values.mastodon.web_domain }}
   WEB_DOMAIN: {{ . }}
diff --git a/values.yaml b/values.yaml
index e606b8b..237ace5 100644
--- a/values.yaml
+++ b/values.yaml
@@ -338,6 +338,7 @@ elasticsearch:
   # hostname:
   # port: 9200
   # tls: true
+  # preset: single_node_cluster
 
   # This is optional, use it if you ES cluster requires authentication
   # user: