diff --git a/cluster/apps/monitoring/kube-prometheus-stack/helm-release.yaml b/cluster/apps/monitoring/kube-prometheus-stack/helm-release.yaml
index 7ab2d09..8f62125 100644
--- a/cluster/apps/monitoring/kube-prometheus-stack/helm-release.yaml
+++ b/cluster/apps/monitoring/kube-prometheus-stack/helm-release.yaml
@@ -68,13 +68,13 @@ spec:
         storageSpec:
           volumeClaimTemplate:
             spec:
-              storageClassName: hostpath
+              storageClassName: longhorn
               selector:
                 matchLabels:
                   app.kubernetes.io/name: kube-prometheus-stack-pv
               resources:
                 requests:
-                  storage: 30Gi
+                  storage: 15Gi
 
     kubeControllerManager:
       enabled: true