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 fecbfea..a693184 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
@@ -883,6 +883,10 @@ defaultDatasources:
 grafana:
   enabled: true
   # all values for grafana helm chart can be specified here
+  persistence:
+    enabled: true
+    type: pvc
+    storageClassName: "standard"
   sidecar:
     datasources:
       enabled: true