diff --git a/otc/penguin-observability.think-ahead.cloud/stacks/observability/victoria-k8s-stack/values.yaml b/otc/penguin-observability.think-ahead.cloud/stacks/observability/victoria-k8s-stack/values.yaml
index 882887f..5c5f33e 100644
--- a/otc/penguin-observability.think-ahead.cloud/stacks/observability/victoria-k8s-stack/values.yaml
+++ b/otc/penguin-observability.think-ahead.cloud/stacks/observability/victoria-k8s-stack/values.yaml
@@ -886,6 +886,7 @@ grafana:
   persistence:
     enabled: true
     type: pvc
+    storageClassName: "default"
   sidecar:
     datasources:
       enabled: true