diff --git a/manifests/opensearch/cluster.yaml b/manifests/opensearch/cluster.yaml
index bfd0b52..ca579ee 100644
--- a/manifests/opensearch/cluster.yaml
+++ b/manifests/opensearch/cluster.yaml
@@ -25,6 +25,8 @@ spec:
       persistence:
         pvc:
           storageClass: yc-network-hdd
+          accessModes:
+            - ReadWriteOnce
       resources:
         requests:
           cpu: 100m