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 38270aef6..615f40bef 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
@@ -8,7 +8,7 @@ spec:
   source:
     chart: cilium
     repoURL: https://helm.cilium.io/
-    targetRevision: 1.15.5
+    targetRevision: 1.15.6
     helm:
       releaseName: cilium
       values: |