diff --git a/Dockerfile b/Dockerfile
index 7f9e5da..0a75fe9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,21 +1,21 @@
 FROM golang:1-alpine as builder
 
-RUN apk --no-cache --no-progress add git make gcc musl-dev
+RUN apk --update upgrade \
+    && apk --no-cache --no-progress add git make gcc musl-dev
 
 WORKDIR /go/src/github.com/ldez/traefik-certs-dumper
 
-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 --no-cache --no-progress add ca-certificates
+RUN apk --update upgrade \
+    && 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