diff --git a/caddy/Dockerfile b/caddy/Dockerfile
index 2b769b9..5545767 100644
--- a/caddy/Dockerfile
+++ b/caddy/Dockerfile
@@ -3,7 +3,7 @@
 # author="Andy Bunce"
 
 ARG VERSION=caddy:2.4.6
-FROM $VERSION AS builder
+FROM $VERSION-builder AS builder
 
 RUN xcaddy build \
     --with  github.com/caddy-dns/duckdns