diff --git a/Dockerfile b/Dockerfile
index dbcb436..0ebaf43 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
-FROM composer:1.9.1 AS composer
-FROM php:7.4-cli-alpine3.11
+FROM composer:1 AS composer
+FROM php:7.4-cli-alpine
 
 ENV REVIEWDOG_VERSION=v0.10.2