diff --git a/Dockerfile b/Dockerfile
index 2b68be9..1a031df 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,15 +1,15 @@
-FROM alpine:3.23.3 as build
+FROM alpine:3.23.3 AS build
 LABEL maintainer="Luke Tainton <luke@tainton.uk>"
 LABEL org.opencontainers.image.source="https://git.tainton.uk/repos/docker-radius"
 
-FROM build as webproc
-ENV WEBPROCVERSION 0.4.0
-ENV WEBPROCURL https://github.com/jpillora/webproc/releases/download/v$WEBPROCVERSION/webproc_"$WEBPROCVERSION"_linux_amd64.gz
+FROM build AS webproc
+ENV WEBPROCVERSION=0.4.0
+ENV WEBPROCURL=https://github.com/jpillora/webproc/releases/download/v$WEBPROCVERSION/webproc_"$WEBPROCVERSION"_linux_amd64.gz
 RUN apk add --no-cache curl
 RUN curl -sL $WEBPROCURL | gzip -d - > /usr/local/bin/webproc
 RUN chmod +x /usr/local/bin/webproc
 
-FROM build as radius
+FROM build
 RUN apk --no-cache add freeradius
 COPY --from=webproc /usr/local/bin/webproc /usr/local/bin/webproc
 ADD clients.conf /etc/raddb/clients.conf