diff --git a/kubernetes-services/templates/prometheus.yaml b/kubernetes-services/templates/prometheus.yaml
index 5428c959..f7bbd50c 100644
--- a/kubernetes-services/templates/prometheus.yaml
+++ b/kubernetes-services/templates/prometheus.yaml
@@ -13,7 +13,7 @@ spec:
   sources:
     - chart: kube-prometheus-stack
       repoURL: https://prometheus-community.github.io/helm-charts
-      targetRevision: 71.1.0
+      targetRevision: 75.6.1
       helm:
         values: |
           prometheusOperator:
@@ -71,6 +71,18 @@ spec:
               storageClassName: longhorn
               accessModes: ["ReadWriteOnce"]
               size: 1Gi
+            initChownData:
+              securityContext:
+                runAsNonRoot: false
+                runAsUser: 0
+                seccompProfile:
+                  type: RuntimeDefault
+                capabilities:
+                  add:
+                    - CHOWN
+                    - DAC_READ_SEARCH
+                  drop:
+                    - ALL
     - path: ./kubernetes-services/additions/prometheus
       repoURL: https://github.com/procinger/turing-pi-v2-cluster.git
       targetRevision: main
diff --git a/test/prometheus_test.go b/test/prometheus_test.go
index 726152ea..dabbfbdf 100644
--- a/test/prometheus_test.go
+++ b/test/prometheus_test.go
@@ -51,9 +51,43 @@ func TestPrometheus(t *testing.T) {
 		)
 
 		promCurrent.Spec.Sources[i].Helm.Values = source.Helm.Values
-		if promUpdate.Spec.Sources != nil {
-			promUpdate.Spec.Sources[i].Helm.Values = source.Helm.Values
+	}
+
+	for i, source := range promUpdate.Spec.Sources {
+		if source.Chart == "" {
+			continue
 		}
+		// replace storageClass; we do not have longhorn in ci
+		source.Helm.Values = strings.Replace(
+			source.Helm.Values,
+			"longhorn",
+			"standard",
+			-1,
+		)
+
+		// also shrink volume
+		source.Helm.Values = strings.Replace(
+			source.Helm.Values,
+			"storage: 20Gi",
+			"storage: 500Mi",
+			-1,
+		)
+
+		source.Helm.Values = strings.Replace(
+			source.Helm.Values,
+			"storage: 5Gi",
+			"storage: 500Mi",
+			-1,
+		)
+
+		source.Helm.Values = strings.Replace(
+			source.Helm.Values,
+			"size: 1Gi",
+			"size: 100Mi",
+			-1,
+		)
+
+		promUpdate.Spec.Sources[i].Helm.Values = source.Helm.Values
 	}
 
 	client, err := test.GetClient()