diff --git a/gce-volumes.yaml b/gce-volumes.yaml
index 57f2ded..bd1b0f2 100644
--- a/gce-volumes.yaml
+++ b/gce-volumes.yaml
@@ -19,6 +19,7 @@ spec:
     storage: 10Gi
   accessModes:
     - ReadWriteOnce
+  storageClassName: slow
   gcePersistentDisk:
     pdName: mariadb
     fsType: ext4
@@ -34,6 +35,7 @@ spec:
     storage: 10Gi
   accessModes:
     - ReadWriteOnce
+  storageClassName: slow
   gcePersistentDisk:
     pdName: wp-wd
     fsType: ext4