diff --git a/kubernetes/main/apps/observability/kube-prometheus-stack/app/helmrelease.yaml b/kubernetes/main/apps/observability/kube-prometheus-stack/app/helmrelease.yaml
index 9209591f9d727..15d25ae419742 100644
--- a/kubernetes/main/apps/observability/kube-prometheus-stack/app/helmrelease.yaml
+++ b/kubernetes/main/apps/observability/kube-prometheus-stack/app/helmrelease.yaml
@@ -28,8 +28,8 @@ spec:
   dependsOn:
     - name: prometheus-operator-crds
       namespace: observability
-    - name: openebs
-      namespace: openebs-system
+    - name: rook-ceph-cluster
+      namespace: rook-ceph
   values:
     crds:
       enabled: false
@@ -48,7 +48,7 @@ spec:
         storage:
           volumeClaimTemplate:
             spec:
-              storageClassName: openebs-hostpath
+              storageClassName: ceph-block
               resources:
                 requests:
                   storage: 1Gi
@@ -90,7 +90,7 @@ spec:
           - memory-snapshot-on-shutdown
           - new-service-discovery-manager
         retention: 14d
-        retentionSize: 70GB
+        retentionSize: 50GB
         resources:
           requests:
             cpu: 100m
@@ -99,10 +99,10 @@ spec:
         storageSpec:
           volumeClaimTemplate:
             spec:
-              storageClassName: openebs-hostpath
+              storageClassName: ceph-block
               resources:
                 requests:
-                  storage: 75Gi
+                  storage: 50Gi
     prometheus-node-exporter:
       fullnameOverride: node-exporter
       prometheus:
diff --git a/kubernetes/main/apps/observability/loki/app/helmrelease.yaml b/kubernetes/main/apps/observability/loki/app/helmrelease.yaml
index 9fe83abd0bb6d..203053d18c059 100644
--- a/kubernetes/main/apps/observability/loki/app/helmrelease.yaml
+++ b/kubernetes/main/apps/observability/loki/app/helmrelease.yaml
@@ -26,8 +26,8 @@ spec:
       strategy: rollback
       retries: 3
   dependsOn:
-    - name: openebs
-      namespace: openebs-system
+    - name: rook-ceph-cluster
+      namespace: rook-ceph
   values:
     deploymentMode: SingleBinary
     loki:
@@ -61,7 +61,7 @@ spec:
       replicas: 1
       persistence:
         enabled: true
-        storageClass: openebs-hostpath
+        storageClass: ceph-block
         size: 50Gi
     gateway:
       replicas: 0