diff --git a/stable/mysql/values.yaml b/stable/mysql/values.yaml
index 59c0984ad7..962100918b 100644
--- a/stable/mysql/values.yaml
+++ b/stable/mysql/values.yaml
@@ -31,7 +31,7 @@ imageTag: "5.7.14"
 persistence:
   enabled: true
   storageClass: generic
-  accessMode: ReadWrite
+  accessMode: ReadWriteOnce
   size: 8Gi
 
 ## Configure resource requests and limits