diff --git a/vault/values.yaml b/vault/values.yaml
index 57fa97c..b846f25 100644
--- a/vault/values.yaml
+++ b/vault/values.yaml
@@ -52,7 +52,7 @@ vault:
       enabled: true
       size: 10Gi
       storageClass: longhorn
-      accessMode: ReadWriteMany
+      accessMode: ReadWriteOnce
 
   ui:
     enabled: false