diff --git a/seichi-onp-k8s/manifests/seichi-kubernetes/apps/seichi-minecraft/seichiassist-downloader/sensor.yaml b/seichi-onp-k8s/manifests/seichi-kubernetes/apps/seichi-minecraft/seichiassist-downloader/sensor.yaml
index 1573485e9..ab7e1a38c 100644
--- a/seichi-onp-k8s/manifests/seichi-kubernetes/apps/seichi-minecraft/seichiassist-downloader/sensor.yaml
+++ b/seichi-onp-k8s/manifests/seichi-kubernetes/apps/seichi-minecraft/seichiassist-downloader/sensor.yaml
@@ -65,7 +65,7 @@ spec:
                           template: upload-artifact
                   - name: download-release
                     container:
-                      image: alpine:3.20
+                      image: alpine:3.21
                       volumeMounts:
                         - name: work
                           mountPath: /work