diff --git a/docker/Dockerfile b/docker/Dockerfile
index 55619ac..882d97e 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -2,7 +2,7 @@
 # Nginx Builder
 #############
 
-FROM debian:bookworm-slim as nginxbuilder
+FROM debian:bookworm-slim AS nginxbuilder
 
 ARG OPENRESTY_VERSION
 ARG LUA_VERSION
@@ -34,7 +34,7 @@ RUN /tmp/build-openresty
 # Final Image
 #############
 
-FROM debian:bookworm-slim as final
+FROM debian:bookworm-slim AS final
 LABEL maintainer="Jamie Curnow <jc@jc21.com>"
 
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
diff --git a/docker/Dockerfile.acmesh b/docker/Dockerfile.acmesh
index a790142..477fff2 100644
--- a/docker/Dockerfile.acmesh
+++ b/docker/Dockerfile.acmesh
@@ -1,5 +1,5 @@
 ARG BASE_IMAGE=nginxproxymanager/nginx-full:latest
-FROM $BASE_IMAGE as final
+FROM $BASE_IMAGE AS final
 ARG BASE_IMAGE
 ARG TARGETPLATFORM
 
diff --git a/docker/Dockerfile.acmesh-golang b/docker/Dockerfile.acmesh-golang
index 4a204d7..97e5e50 100644
--- a/docker/Dockerfile.acmesh-golang
+++ b/docker/Dockerfile.acmesh-golang
@@ -1,6 +1,6 @@
 ARG ACMESH_IMAGE=nginxproxymanager/nginx-full:acmesh
-FROM golang:latest as go
-FROM $ACMESH_IMAGE as final
+FROM golang:latest AS go
+FROM $ACMESH_IMAGE AS final
 ARG ACMESH_IMAGE
 ARG TARGETPLATFORM
 
diff --git a/docker/Dockerfile.certbot b/docker/Dockerfile.certbot
index 843c525..34d09f5 100644
--- a/docker/Dockerfile.certbot
+++ b/docker/Dockerfile.certbot
@@ -4,7 +4,7 @@ ARG BASE_IMAGE=nginxproxymanager/nginx-full:latest
 # Certbot Builder
 #############
 
-FROM debian:bookworm-slim as certbotbuilder
+FROM debian:bookworm-slim AS certbotbuilder
 
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 
@@ -41,7 +41,7 @@ RUN pip install --no-cache-dir --upgrade pyopenssl \
 #############
 # Final Image
 #############
-FROM $BASE_IMAGE as final
+FROM $BASE_IMAGE AS final
 ARG BASE_IMAGE
 ARG TARGETPLATFORM
 
diff --git a/docker/Dockerfile.certbot-node b/docker/Dockerfile.certbot-node
index 48b402b..2960fba 100644
--- a/docker/Dockerfile.certbot-node
+++ b/docker/Dockerfile.certbot-node
@@ -1,5 +1,5 @@
 ARG CERTBOT_IMAGE=nginxproxymanager/nginx-full:certbot
-FROM $CERTBOT_IMAGE as final
+FROM $CERTBOT_IMAGE AS final
 ARG CERTBOT_IMAGE
 ARG TARGETPLATFORM