diff --git a/Dockerfile b/Dockerfile
index bebaff0..de276fe 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
-FROM python:3.9-alpine as base
-FROM base as builder
+FROM python:3.9-alpine AS base
+FROM base AS builder
 
 RUN mkdir /install
 WORKDIR /install