diff --git a/seichi-onp-k8s/manifests/seichi-kubernetes/apps/cluster-wide-apps/app-of-other-apps/prometheus-operator.yaml b/seichi-onp-k8s/manifests/seichi-kubernetes/apps/cluster-wide-apps/app-of-other-apps/prometheus-operator.yaml
index d4f56485c..aa0e9293d 100644
--- a/seichi-onp-k8s/manifests/seichi-kubernetes/apps/cluster-wide-apps/app-of-other-apps/prometheus-operator.yaml
+++ b/seichi-onp-k8s/manifests/seichi-kubernetes/apps/cluster-wide-apps/app-of-other-apps/prometheus-operator.yaml
@@ -8,7 +8,7 @@ spec:
   source:
     repoURL: https://github.com/prometheus-community/helm-charts.git
     path: charts/kube-prometheus-stack/charts/crds/
-    targetRevision: kube-prometheus-stack-54.0.1
+    targetRevision: kube-prometheus-stack-55.0.0
     directory:
       recurse: true
   destination:
@@ -35,7 +35,7 @@ spec:
   source:
     chart: kube-prometheus-stack
     repoURL: https://prometheus-community.github.io/helm-charts
-    targetRevision: 54.1.0
+    targetRevision: 55.0.0
     helm:
       releaseName: prometheus
       skipCrds: true