diff --git a/charts/opensearch/CHANGELOG.md b/charts/opensearch/CHANGELOG.md
index 5dfe426f..56d0c87d 100644
--- a/charts/opensearch/CHANGELOG.md
+++ b/charts/opensearch/CHANGELOG.md
@@ -7,6 +7,20 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ---
 ## [Unreleased]
 ### Added
+### Changed
+### Deprecated
+### Removed
+### Fixed
+### Security
+---
+## [1.5.6]
+### Added
+**BREAKING CHANGE**
+This version introduces a change in the service name definitions that will break Helm upgrades due to changes in the `StatefulSet`. 
+
+To resolve: Simply delete the existing statefulset in the cluster and ensure the PVC is retained (by default, this should be the case). `kubectl delete sts opensearch-cluster-master`
+After deleting the statefulset and upgrading the helm chart again, the new replacement statefulset will be created and should consume the same PVC as before. 
+
 ### Changed
 ### Deprecated
 ### Removed
diff --git a/charts/opensearch/Chart.yaml b/charts/opensearch/Chart.yaml
index 4bdfad9f..fa3cea1b 100644
--- a/charts/opensearch/Chart.yaml
+++ b/charts/opensearch/Chart.yaml
@@ -15,7 +15,7 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 1.5.5
+version: 1.5.6
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to
diff --git a/charts/opensearch/templates/_helpers.tpl b/charts/opensearch/templates/_helpers.tpl
index 07274ca9..6c47e408 100755
--- a/charts/opensearch/templates/_helpers.tpl
+++ b/charts/opensearch/templates/_helpers.tpl
@@ -78,6 +78,14 @@ app.kubernetes.io/instance: {{ .Release.Name }}
 {{- end -}}
 {{- end -}}
 
+{{- define "opensearch.serviceName" -}}
+{{- if eq .Values.nodeGroup "master" }}
+{{- include "opensearch.masterService" . }}
+{{- else }}
+{{- include "opensearch.uname" . }}
+{{- end }}
+{{- end -}}
+
 {{- define "opensearch.endpoints" -}}
 {{- $replicas := int (toString (.Values.replicas)) }}
 {{- $uname := (include "opensearch.uname" .) }}
diff --git a/charts/opensearch/templates/ingress.yaml b/charts/opensearch/templates/ingress.yaml
index 67a12e4b..7a4d0da8 100644
--- a/charts/opensearch/templates/ingress.yaml
+++ b/charts/opensearch/templates/ingress.yaml
@@ -1,5 +1,5 @@
 {{- if .Values.ingress.enabled -}}
-{{- $fullName := include "opensearch.uname" . -}}
+{{- $fullName := include "opensearch.serviceName" . -}}
 {{- $servicePort := .Values.httpPort -}}
 {{- $ingressPath := .Values.ingress.path -}}
 {{- $ingressApiIsStable := eq (include "opensearch.ingress.isStable" .) "true" -}}
diff --git a/charts/opensearch/templates/service.yaml b/charts/opensearch/templates/service.yaml
index 7bc81862..ffad0cd3 100644
--- a/charts/opensearch/templates/service.yaml
+++ b/charts/opensearch/templates/service.yaml
@@ -2,11 +2,7 @@
 kind: Service
 apiVersion: v1
 metadata:
-{{- if eq .Values.nodeGroup "master" }}
-  name: {{ template "opensearch.masterService" . }}
-{{- else }}
-  name: {{ template "opensearch.uname" . }}
-{{- end }}
+  name: {{ template "opensearch.serviceName" . }}
   labels:
     {{- include "opensearch.labels" . | nindent 4 }}
 {{- if .Values.service.labels }}
@@ -42,11 +38,7 @@ spec:
 kind: Service
 apiVersion: v1
 metadata:
-{{- if eq .Values.nodeGroup "master" }}
-  name: {{ template "opensearch.masterService" . }}-headless
-{{- else }}
-  name: {{ template "opensearch.uname" . }}-headless
-{{- end }}
+  name: {{ template "opensearch.serviceName" . }}-headless
   labels:
     {{- include "opensearch.labels" . | nindent 4 }}
 {{- if .Values.service.labelsHeadless }}
diff --git a/charts/opensearch/templates/statefulset.yaml b/charts/opensearch/templates/statefulset.yaml
index 135eae7f..5f621fd1 100644
--- a/charts/opensearch/templates/statefulset.yaml
+++ b/charts/opensearch/templates/statefulset.yaml
@@ -8,7 +8,7 @@ metadata:
   annotations:
     majorVersion: "{{ include "opensearch.majorVersion" . }}"
 spec:
-  serviceName: {{ template "opensearch.uname" . }}-headless
+  serviceName: {{ template "opensearch.serviceName" . }}-headless
   selector:
     matchLabels:
       {{- include "opensearch.selectorLabels" . | nindent 6 }}