diff --git a/Dockerfile b/Dockerfile
index e6f18a2..7a4c32a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,8 @@
 # Build
-FROM golang:1.13-buster AS build
+FROM golang:1.15-buster AS build
 WORKDIR /go/src/github.com/mpolden/echoip
 COPY . .
+
 # Must build without cgo because libc is unavailable in runtime image
 ENV GO111MODULE=on CGO_ENABLED=0
 RUN make