diff --git a/tools/alpine/Dockerfile b/tools/alpine/Dockerfile
index 1f215c3de..c6ce018fa 100644
--- a/tools/alpine/Dockerfile
+++ b/tools/alpine/Dockerfile
@@ -3,6 +3,8 @@ FROM alpine:3.6 AS mirror
 # update base image
 RUN apk update && apk upgrade -a
 
+# Copy Dockerfile so we can include it in the hash
+COPY Dockerfile /Dockerfile
 COPY packages /tmp/
 
 # mirror packages
@@ -42,6 +44,7 @@ COPY --from=mirror /etc/apk/repositories /etc/apk/repositories
 COPY --from=mirror /etc/apk/keys /etc/apk/keys/
 COPY --from=mirror /mirror /mirror/
 COPY --from=mirror /go/bin /go/bin/
+COPY --from=mirror /Dockerfile /Dockerfile
 
 COPY --from=shellcheck /usr/local/bin/shellcheck /usr/local/bin/shellcheck
 COPY --from=shellcheck /usr/local/lib/ /usr/local/lib/
diff --git a/tools/alpine/Makefile b/tools/alpine/Makefile
index 66871dea6..6769afad4 100644
--- a/tools/alpine/Makefile
+++ b/tools/alpine/Makefile
@@ -6,10 +6,10 @@ BASE=alpine:3.6
 
 default: push
 
-hash:
+hash: Dockerfile Makefile packages
 	DOCKER_CONTENT_TRUST=1 docker pull $(BASE)
 	docker build --no-cache -t $(IMAGE):build .
-	docker run --rm $(IMAGE):build sh -c 'echo /lib/apk/db/installed $$(find /mirror -name '*.apk' -type f) $$(find /go/bin -type f) | xargs cat | sha1sum' | sed 's/ .*//' > $@
+	docker run --rm $(IMAGE):build sh -c 'echo Dockerfile /lib/apk/db/installed $$(find /mirror -name '*.apk' -type f) $$(find /go/bin -type f) | xargs cat | sha1sum' | sed 's/ .*//' > $@
 
 push: hash
 	DOCKER_CONTENT_TRUST=1 docker pull $(ORG)/$(IMAGE):$(shell cat hash) || \