diff --git a/Dockerfile b/Dockerfile
index 421fae0..23338d9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,12 +1,12 @@
 FROM golang:alpine
 
-MAINTAINER Knut Ahlers <knut@ahlers.me>
+LABEL maintainer "Knut Ahlers <knut@ahlers.me>"
 
 ADD . /go/src/github.com/Luzifer/mondash
 WORKDIR /go/src/github.com/Luzifer/mondash
 
 RUN set -ex \
- && apk add --update git \
+ && apk add --update git ca-certificates \
  && go install -ldflags "-X main.version=$(git describe --tags || git rev-parse --short HEAD || echo dev)" \
  && apk del --purge git