diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..0cace7a
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,8 @@
+.idea/
+vendor/
+dist/
+dump/
+dumpcerts.sh
+acme.json
+acme-backup.json
+traefik-certs-dumper
diff --git a/Dockerfile b/Dockerfile
index bfc4763..0a75fe9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,21 +1,21 @@
 FROM golang:1-alpine as builder
 
 RUN apk --update upgrade \
-&& apk --no-cache --no-progress add git make gcc musl-dev \
-&& rm -rf /var/cache/apk/*
+    && apk --no-cache --no-progress add git make gcc musl-dev
 
 WORKDIR /go/src/github.com/ldez/traefik-certs-dumper
-COPY . .
 
-RUN go get -u github.com/golang/dep/cmd/dep
 ENV GO111MODULE on
+COPY go.mod go.sum ./
 RUN go mod download
+
+COPY . .
 RUN make build
 
 FROM alpine:3.9
 RUN apk --update upgrade \
-    && apk --no-cache --no-progress add ca-certificates git \
-    && rm -rf /var/cache/apk/*
+    && apk --no-cache --no-progress add ca-certificates \
+    && update-ca-certificates
 
 COPY --from=builder /go/src/github.com/ldez/traefik-certs-dumper/traefik-certs-dumper /usr/bin/traefik-certs-dumper