diff --git a/Dockerfile b/Dockerfile
index c4ba0508..a341e5c9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.12-alpine AS builder
+FROM golang:1.13.5-alpine AS builder
 RUN apk add --no-cache make git
 WORKDIR /go/src/github.com/mackerelio/mkr/
 COPY . .