diff --git a/build/Dockerfile b/build/Dockerfile
index fb3874fe95c0c9b96e152d96247665c72e0714ab..595c5ee64698c979fdd9efc1f815758cb69683bd 100644
--- a/build/Dockerfile
+++ b/build/Dockerfile
@@ -15,7 +15,7 @@
 # docker build "$PWD" --build-arg commit="$(git rev-parse --short HEAD)" --build-arg version=v2.1.1 -t heroiclabs/nakama:2.1.1
 # docker build "$PWD" --build-arg commit="$(git rev-parse --short HEAD)" --build-arg version="v2.1.1-$(git rev-parse --short HEAD)" -t heroiclabs/nakama-prerelease:"2.1.1-$(git rev-parse --short HEAD)"
 
-FROM golang:1.11.5-alpine3.8 as builder
+FROM golang:1.12.0-alpine3.9 as builder
 
 ARG commit
 ARG version
@@ -32,7 +32,7 @@ WORKDIR /go/src/github.com/heroiclabs/nakama
 RUN git checkout --quiet "$commit" && \
     go build -o /go/build/nakama -gcflags "-trimpath $PWD" -asmflags "-trimpath $PWD" -ldflags "-s -w -X main.version=$version -X main.commitID=$commit"
 
-FROM alpine:3.8
+FROM alpine:3.9
 
 MAINTAINER Heroic Labs <support@heroiclabs.com>
 
diff --git a/build/pluginbuilder/Dockerfile b/build/pluginbuilder/Dockerfile
index 2b33f7508cf9ac44f6af961528e222dd43d62585..eca206354fc99be5b1cf504eaa779f4ffe4c101a 100644
--- a/build/pluginbuilder/Dockerfile
+++ b/build/pluginbuilder/Dockerfile
@@ -15,7 +15,7 @@
 # docker build "$PWD" --file ./Dockerfile.pluginbuilder --build-arg commit="$(git rev-parse --short HEAD)" --build-arg version=v2.1.1 -t heroiclabs/nakama-pluginbuilder:2.1.1
 # docker build "$PWD" --file ./Dockerfile.pluginbuilder --build-arg commit="$(git rev-parse --short HEAD)" --build-arg version="v2.1.1-$(git rev-parse --short HEAD)" -t heroiclabs/nakama-prerelease:"2.1.1-$(git rev-parse --short HEAD)"
 
-FROM golang:1.11.5-alpine3.8 as builder
+FROM golang:1.12.0-alpine3.9 as builder
 
 MAINTAINER Heroic Labs <support@heroiclabs.com>