diff --git a/k8s/charts/seaweedfs/values.yaml b/k8s/charts/seaweedfs/values.yaml
index 8b8c0d33d..576b7da22 100644
--- a/k8s/charts/seaweedfs/values.yaml
+++ b/k8s/charts/seaweedfs/values.yaml
@@ -606,7 +606,7 @@ filer:
     timeoutSeconds: 10
 
   # secret env variables
-  secretExtraEnvironmentVars: []
+  secretExtraEnvironmentVars: {}
       # WEED_POSTGRES_USERNAME:
       #   secretKeyRef:
       #     name: postgres-credentials