diff --git a/.github/workflows/pluto.yaml b/.github/workflows/pluto.yaml
index 216bf5242..ecabbc53b 100644
--- a/.github/workflows/pluto.yaml
+++ b/.github/workflows/pluto.yaml
@@ -18,8 +18,8 @@ jobs:
 
       - name: Use pluto
         run: |
-          pluto detect-files -d seichi-onp-k8s/manifests/seichi-kubernetes/apps --target-versions k8s=v1.27.6
+          pluto detect-files -d seichi-onp-k8s/manifests/seichi-kubernetes/apps --target-versions k8s=v1.27.8
 
       - name: Use pluto
         run: |
-          pluto detect-files -d seichi-onp-k8s/manifests/seichi-kubernetes/app-templates --target-versions k8s=v1.27.6
+          pluto detect-files -d seichi-onp-k8s/manifests/seichi-kubernetes/app-templates --target-versions k8s=v1.27.8
diff --git a/seichi-onp-k8s/cluster-boot-up/README.md b/seichi-onp-k8s/cluster-boot-up/README.md
index 064c409fa..b102ff31d 100644
--- a/seichi-onp-k8s/cluster-boot-up/README.md
+++ b/seichi-onp-k8s/cluster-boot-up/README.md
@@ -66,7 +66,7 @@ KubernetesノードのVMは cloudinit イメージで作成されています。
 2022/05/23現在、クラスタは (3 control plane nodes + 3 worker nodes) の構成で[作成されています](https://github.com/GiganticMinecraft/seichi_infra/blob/9b6a9346371b8f2add3a786b6badbe4e13d4464c/seichi-onp-k8s/cluster-boot-scripts/deploy-vm.sh#L14-L19)。
 
 クラスタの作成は以下のツール群で行っています。
-  - kubeadm, kubectl, kubelet v1.27.6
+  - kubeadm, kubectl, kubelet v1.27.8
 
 CNI には Cilium を利用しています。
 
diff --git a/seichi-onp-k8s/cluster-boot-up/scripts/nodes/k8s-node-setup.sh b/seichi-onp-k8s/cluster-boot-up/scripts/nodes/k8s-node-setup.sh
index 455f6b21a..d08ad2d71 100644
--- a/seichi-onp-k8s/cluster-boot-up/scripts/nodes/k8s-node-setup.sh
+++ b/seichi-onp-k8s/cluster-boot-up/scripts/nodes/k8s-node-setup.sh
@@ -115,10 +115,10 @@ EOF
 sysctl --system
 
 # Install kubeadm
-curl -fsSL https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-archive-keyring.gpg
-echo "deb [signed-by=/etc/apt/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list
+curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.27/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
+echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.27/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list
 apt-get update
-apt-get install -y kubeadm kubelet=1.27.6-00 kubectl=1.27.6-00
+apt-get install -y kubeadm kubelet=1.27.8-1.1 kubectl=1.27.8-1.1
 apt-mark hold kubelet kubectl
 
 # Disable swap
@@ -297,7 +297,7 @@ etcd:
   local:
     extraArgs:
       listen-metrics-urls: http://0.0.0.0:2381
-kubernetesVersion: "v1.27.6"
+kubernetesVersion: "v1.27.8"
 controlPlaneEndpoint: "${KUBE_API_SERVER_VIP}:8443"
 apiServer:
   certSANs:
@@ -345,7 +345,9 @@ helm install cilium cilium/cilium \
     --set kubeProxyReplacement=strict \
     --set k8sServiceHost=${KUBE_API_SERVER_VIP} \
     --set k8sServicePort=8443 \
-    --set bgpControlPlane.enabled=true
+    --set bgpControlPlane.enabled=true \
+    --set ipam.mode=cluster-pool \
+    --set ipam.operator.clusterPoolIPv4PodCIDRList=["10.96.128.0/18"]
 
 # Generate control plane certificate
 KUBEADM_UPLOADED_CERTS=$(kubeadm init phase upload-certs --upload-certs | tail -n 1)
diff --git a/seichi-onp-k8s/manifests/seichi-kubernetes/apps/cluster-wide-apps/app-of-other-apps/cilium.yaml b/seichi-onp-k8s/manifests/seichi-kubernetes/apps/cluster-wide-apps/app-of-other-apps/cilium.yaml
index 26ae0ca3f..fe073d4fb 100644
--- a/seichi-onp-k8s/manifests/seichi-kubernetes/apps/cluster-wide-apps/app-of-other-apps/cilium.yaml
+++ b/seichi-onp-k8s/manifests/seichi-kubernetes/apps/cluster-wide-apps/app-of-other-apps/cilium.yaml
@@ -28,6 +28,7 @@ spec:
         ipv6:
           enabled: false
         ipam:
+          mode: cluster-pool
           operator:
             # -- IPv4 CIDR list range to delegate to individual nodes for IPAM.
             clusterPoolIPv4PodCIDRList: ["10.96.128.0/18"]