diff --git a/k8s/charts/seaweedfs/templates/filer-statefulset.yaml b/k8s/charts/seaweedfs/templates/filer-statefulset.yaml
index cec425b80..a92d3cdd1 100644
--- a/k8s/charts/seaweedfs/templates/filer-statefulset.yaml
+++ b/k8s/charts/seaweedfs/templates/filer-statefulset.yaml
@@ -52,7 +52,7 @@ spec:
       {{- end }}
       {{- include "seaweedfs.imagePullSecrets" . | nindent 6 }}
       {{- if .Values.global.createClusterRole }}
-      serviceAccountName: {{ default .Values.global.serviceAccountName .Values.filer.serviceAccountName }} # for deleting statefulset pods after migration
+      serviceAccountName: {{ .Values.filer.serviceAccountName | default .Values.global.serviceAccountName | quote }} # for deleting statefulset pods after migration
       {{- end }}
       terminationGracePeriodSeconds: 60
       {{- if .Values.filer.priorityClassName }}
diff --git a/k8s/charts/seaweedfs/templates/master-statefulset.yaml b/k8s/charts/seaweedfs/templates/master-statefulset.yaml
index 03509029c..db36d4ab6 100644
--- a/k8s/charts/seaweedfs/templates/master-statefulset.yaml
+++ b/k8s/charts/seaweedfs/templates/master-statefulset.yaml
@@ -56,7 +56,7 @@ spec:
       {{- end }}
       enableServiceLinks: false
       {{- if .Values.global.createClusterRole }}
-      serviceAccountName: {{ default .Values.global.serviceAccountName .Values.master.serviceAccountName }} # for deleting statefulset pods after migration
+      serviceAccountName: {{ .Values.master.serviceAccountName | default .Values.global.serviceAccountName | quote }} # for deleting statefulset pods after migration
       {{- end }}
       {{- if .Values.master.initContainers }}
       initContainers:
diff --git a/k8s/charts/seaweedfs/templates/volume-statefulset.yaml b/k8s/charts/seaweedfs/templates/volume-statefulset.yaml
index cef34a2c5..e74311673 100644
--- a/k8s/charts/seaweedfs/templates/volume-statefulset.yaml
+++ b/k8s/charts/seaweedfs/templates/volume-statefulset.yaml
@@ -50,7 +50,7 @@ spec:
       {{- end }}
       enableServiceLinks: false
       {{- if .Values.global.createClusterRole }}
-      serviceAccountName: {{ default .Values.global.serviceAccountName .Values.volume.serviceAccountName }} # for deleting statefulset pods after migration
+      serviceAccountName: {{ .Values.volume.serviceAccountName | default .Values.global.serviceAccountName | quote }} # for deleting statefulset pods after migration
       {{- end }}
       {{- $initContainers_exists := include "volume.initContainers_exists" . -}}
       {{- if $initContainers_exists }}