diff --git a/Dockerfile-CI.Dockerfile b/Dockerfile-CI.Dockerfile
index 6e87799..e97bc9e 100644
--- a/Dockerfile-CI.Dockerfile
+++ b/Dockerfile-CI.Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:bullseye-slim as builder
+FROM debian:bullseye-slim AS builder
 WORKDIR /builder
 
 RUN apt-get update \
diff --git a/Dockerfile-CI.alpine.Dockerfile b/Dockerfile-CI.alpine.Dockerfile
index 8394756..c82db4b 100644
--- a/Dockerfile-CI.alpine.Dockerfile
+++ b/Dockerfile-CI.alpine.Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:latest as builder
+FROM alpine:latest AS builder
 WORKDIR /builder
 
 RUN apk update \