diff --git a/k8s/seaweedfs/templates/volume-statefulset.yaml b/k8s/seaweedfs/templates/volume-statefulset.yaml
index 4dcbf634d..fff48095b 100644
--- a/k8s/seaweedfs/templates/volume-statefulset.yaml
+++ b/k8s/seaweedfs/templates/volume-statefulset.yaml
@@ -86,6 +86,9 @@ spec:
                 -metricsPort {{ .Values.volume.metricsPort }} \
                 {{- end }}
                 -dir={{ .Values.volume.dir }} \
+                {{- if .Values.volume.dir_idx }}
+                -dir.idx={{ .Values.volume.dir_idx }} \
+                {{- end }}
                 -max={{ .Values.volume.maxVolumes }} \
                 {{- if .Values.volume.rack }}
                 -rack={{ .Values.volume.rack }} \
diff --git a/k8s/seaweedfs/values.yaml b/k8s/seaweedfs/values.yaml
index 3737a7bd9..d2b4b1956 100644
--- a/k8s/seaweedfs/values.yaml
+++ b/k8s/seaweedfs/values.yaml
@@ -144,6 +144,8 @@ volume:
 
   # Directories to store data files. dir[,dir]... (default "/tmp")
   dir: "/data"
+  # Directories to store index files. dir[,dir]... (default "/tmp")
+  dir_idx: null
 
   # Maximum numbers of volumes, count[,count]...
   # If set to zero on non-windows OS, the limit will be auto configured. (default "7")