diff --git a/docker/scratch/Dockerfile b/docker/scratch/Dockerfile
index 1a07989..00525f0 100644
--- a/docker/scratch/Dockerfile
+++ b/docker/scratch/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:latest as certs
+FROM alpine:latest AS certs
 RUN apk --update add ca-certificates
 FROM scratch
 ARG TARGETARCH