diff --git a/cmd/kured/Dockerfile b/cmd/kured/Dockerfile
index 5530137..1163995 100644
--- a/cmd/kured/Dockerfile
+++ b/cmd/kured/Dockerfile
@@ -1,5 +1,5 @@
 FROM alpine:3.12
-RUN apk update && apk add ca-certificates tzdata && rm -rf /var/cache/apk/*
+RUN apk add --no-cache ca-certificates tzdata
 # NB: you may need to update RBAC permissions when upgrading kubectl - see kured-rbac.yaml for details
 ADD https://storage.googleapis.com/kubernetes-release/release/v1.18.8/bin/linux/amd64/kubectl /usr/bin/kubectl
 RUN chmod 0755 /usr/bin/kubectl