diff --git a/cmd/golangorg/Dockerfile.prod b/cmd/golangorg/Dockerfile.prod
index a154051..763ad4e 100644
--- a/cmd/golangorg/Dockerfile.prod
+++ b/cmd/golangorg/Dockerfile.prod
@@ -1,7 +1,7 @@
 # Builder
 #########
 
-FROM golang:1.11 AS build
+FROM golang:1.12 AS build
 
 RUN apt-get update && apt-get install -y \
       zip # required for generate-index.bash
@@ -16,6 +16,7 @@
 ENV GOROOT /goroot
 ENV PATH=/goroot/bin:$PATH
 ENV GO111MODULE=on
+ENV GOPROXY=https://proxy.golang.org
 
 RUN go version