diff --git a/charts/greptimedb-cluster/Chart.yaml b/charts/greptimedb-cluster/Chart.yaml
index 1eccf18..5aedf6f 100644
--- a/charts/greptimedb-cluster/Chart.yaml
+++ b/charts/greptimedb-cluster/Chart.yaml
@@ -2,7 +2,7 @@ apiVersion: v2
 name: greptimedb-cluster
 description: A Helm chart for deploying GreptimeDB cluster in Kubernetes.
 type: application
-version: 0.2.4
+version: 0.2.5
 appVersion: 0.9.1
 home: https://github.com/GreptimeTeam/greptimedb
 sources:
diff --git a/charts/greptimedb-cluster/README.md b/charts/greptimedb-cluster/README.md
index 151b404..698a885 100644
--- a/charts/greptimedb-cluster/README.md
+++ b/charts/greptimedb-cluster/README.md
@@ -2,7 +2,7 @@
 
 A Helm chart for deploying GreptimeDB cluster in Kubernetes.
 
-![Version: 0.2.4](https://img.shields.io/badge/Version-0.2.4-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 0.9.1](https://img.shields.io/badge/AppVersion-0.9.1-informational?style=flat-square)
+![Version: 0.2.5](https://img.shields.io/badge/Version-0.2.5-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 0.9.1](https://img.shields.io/badge/AppVersion-0.9.1-informational?style=flat-square)
 
 ## Source Code
 
diff --git a/charts/greptimedb-cluster/templates/cluster.yaml b/charts/greptimedb-cluster/templates/cluster.yaml
index 06cd2e4..7e14442 100644
--- a/charts/greptimedb-cluster/templates/cluster.yaml
+++ b/charts/greptimedb-cluster/templates/cluster.yaml
@@ -285,16 +285,24 @@ spec:
     s3: {{- toYaml .Values.objectStorage.s3 | nindent 6 }}
       {{- if .Values.objectStorage }}
       {{- if .Values.objectStorage.credentials }}
+      {{- if .Values.objectStorage.credentials.existingSecretName }}
+      secretName: {{ .Values.objectStorage.credentials.existingSecretName }}
+      {{- else }}
       secretName: {{ default "storage-credentials" .Values.objectStorage.credentials.secretName }}
       {{- end }}
       {{- end }}
+      {{- end }}
     {{- else if .Values.objectStorage.oss }}
     oss: {{- toYaml .Values.objectStorage.oss | nindent 6 }}
       {{- if .Values.objectStorage }}
       {{- if .Values.objectStorage.credentials }}
+      {{- if .Values.objectStorage.credentials.existingSecretName }}
+      secretName: {{ .Values.objectStorage.credentials.existingSecretName }}
+      {{- else }}
       secretName: {{ default "storage-credentials" .Values.objectStorage.credentials.secretName }}
       {{- end }}
       {{- end }}
+      {{- end }}
     {{- else }}
     {}
     {{- end }}
diff --git a/charts/greptimedb-cluster/templates/secret.yaml b/charts/greptimedb-cluster/templates/secret.yaml
index d1927f8..a373609 100644
--- a/charts/greptimedb-cluster/templates/secret.yaml
+++ b/charts/greptimedb-cluster/templates/secret.yaml
@@ -1,5 +1,6 @@
 {{- if .Values.objectStorage }}
 {{- if .Values.objectStorage.credentials }}
+{{- if not .Values.objectStorage.credentials.existingSecretName }}
 apiVersion: v1
 metadata:
   name: {{ default "storage-credentials" .Values.objectStorage.credentials.secretName }}
@@ -11,3 +12,4 @@ stringData:
   secret-access-key: {{ .Values.objectStorage.credentials.secretAccessKey }}
 {{- end }}
 {{- end }}
+{{- end }}
diff --git a/charts/greptimedb-cluster/values.yaml b/charts/greptimedb-cluster/values.yaml
index 0dbd4fa..d1a5a7b 100644
--- a/charts/greptimedb-cluster/values.yaml
+++ b/charts/greptimedb-cluster/values.yaml
@@ -403,6 +403,7 @@ objectStorage:
 #    accessKeyId: "you-should-set-the-access-key-id-here"
 #    secretAccessKey: "you-should-set-the-secret-access-key-here"
 #    secretName: ""
+#    existingSecretName: ""
 
   # configure to use s3 storage.
   s3: {}