diff --git a/rootfs/Dockerfile b/rootfs/Dockerfile
index df16f15d7..53757cd8d 100644
--- a/rootfs/Dockerfile
+++ b/rootfs/Dockerfile
@@ -14,6 +14,8 @@
 
 FROM alpine:3.3
 
+RUN apk update && apk add ca-certificates && rm -rf /var/cache/apk/*
+
 ENV HOME /tmp
 
 COPY tiller /tiller