diff --git a/Dockerfile b/Dockerfile
index 23babc89ccddccc4ba236b94936cd990a7c5ebc9..21be9c8a7877e145cb8f4ac709a776bdce14d5b0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -113,7 +113,11 @@ RUN chmod +x /usr/local/bin/composer
 
 RUN apt-get update && apt-get install -y bzr && apt-get clean
 
-ENV GOLANG_VERSION 1.12
+ENV GOLANG_VERSION 1.13
+
+# Disable GOPROXY and GOSUMDB until we offer a solid solution to configure
+# private repositories.
+ENV GOPROXY=direct GOSUMDB=off
 
 RUN wget -q -O go.tgz "https://golang.org/dl/go${GOLANG_VERSION}.linux-amd64.tar.gz" && \
   tar -C /usr/local -xzf go.tgz && \