diff --git a/Dockerfile b/Dockerfile
index 30c88ef..ae034a0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1-alpine as builder
+FROM golang:1-alpine AS builder
 
 RUN apk --no-cache --no-progress add git ca-certificates tzdata make \
     && update-ca-certificates \