diff --git a/cmd/kured/Dockerfile b/cmd/kured/Dockerfile
index 218adbb..ac23cfd 100644
--- a/cmd/kured/Dockerfile
+++ b/cmd/kured/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu
+FROM ubuntu:16.04
 RUN apt-get update && apt-get install -y ca-certificates && rm -rf /var/cache/apt
 ADD https://storage.googleapis.com/kubernetes-release/release/v1.7.6/bin/linux/amd64/kubectl /usr/bin/kubectl
 RUN chmod 0755 /usr/bin/kubectl