diff --git a/Dockerfile b/Dockerfile
index 1533ed4..b1bc538 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,8 +6,10 @@ ENV ALPINE_MIRROR https://uk.alpinelinux.org/alpine/${ALPINE_SERIES}
 ENV ALPINE_ARCH x86_64
 
 WORKDIR /root
-RUN set -x; apk add --no-cache curl &&\
+RUN set -xo pipefail; apk add --no-cache curl &&\
   curl -LO ${ALPINE_MIRROR}/releases/${ALPINE_ARCH}/alpine-minirootfs-${VERSION}-${ALPINE_ARCH}.tar.gz &&\
+  curl -LO http://nl.alpinelinux.org/alpine/${ALPINE_SERIES}/releases/${ALPINE_ARCH}/alpine-minirootfs-${VERSION}-${ALPINE_ARCH}.tar.gz.sha512 &&\
+  sha512sum -c alpine-minirootfs-${VERSION}-${ALPINE_ARCH}.tar.gz.sha512 &&\
   mkdir /dest &&\
   tar -C /dest -xvzf alpine-minirootfs-${VERSION}-${ALPINE_ARCH}.tar.gz