diff --git a/Dockerfile b/Dockerfile
index ec19a69..ed25f8b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,4 @@
 FROM golang:1.11-alpine3.7
 ENV GO111MODULE=on
+ENV GOFLAGS=-mod-vendor
 RUN apk --no-cache add build-base git