diff --git a/stalwart/values.yaml b/stalwart/values.yaml
index 939cc70..91d0d17 100644
--- a/stalwart/values.yaml
+++ b/stalwart/values.yaml
@@ -17,7 +17,7 @@ service:
 
 persistence:
   enabled: true
-  storageClass: "standard"
+  storageClass: longhorn
   accessMode: ReadWriteOnce
   size: 10Gi
   mountPath: /opt/stalwart