diff --git a/elasticsearch/templates/_helpers.tpl b/elasticsearch/templates/_helpers.tpl
index b47e2fed8..afe0fa0b3 100644
--- a/elasticsearch/templates/_helpers.tpl
+++ b/elasticsearch/templates/_helpers.tpl
@@ -37,7 +37,7 @@ tls.crt: {{ index $certs.data "tls.crt" }}
 tls.key: {{ index $certs.data "tls.key" }}
 ca.crt: {{ index $certs.data "ca.crt" }}
 {{- else -}}
-{{- $altNames := list ( include "elasticsearch.masterService" . ) ( printf "%s.%s" (include "elasticsearch.masterService" .) .Release.Namespace ) ( printf "%s.%s.svc" (include "elasticsearch.masterService" .) .Release.Namespace ) -}}
+{{- $altNames := list ( include "elasticsearch.masterService" . ) ( printf "%s.%s" (include "elasticsearch.masterService" .) .Release.Namespace ) ( printf "%s.%s.svc" (include "elasticsearch.masterService" .) .Release.Namespace ) ( printf "%s.%s.svc.cluster.local" (include "elasticsearch.masterService" .) .Release.Namespace ) -}}
 {{- $ca := genCA "elasticsearch-ca" 365 -}}
 {{- $cert := genSignedCert ( include "elasticsearch.masterService" . ) nil $altNames 365 $ca -}}
 tls.crt: {{ $cert.Cert | toString | b64enc }}