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 e336e48ad..0e8bfa09d 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
@@ -71,7 +71,6 @@ spec:
                           mountPath: /work
                       command:
                         - "apt-get"
-                        - "-y"
                         - "update"
                         - "&&"
                         - "apt-get"