diff --git a/Dockerfile b/Dockerfile
index 2aab39f..322d0d1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,7 @@ RUN  go mod download
 ADD . /src
 RUN  go build -o /cache-proxy ./cmd/proxy
 
-FROM docker.io/library/alpine:3.21 as runtime
+FROM docker.io/library/alpine:3.21 AS runtime
 COPY --from=0 /cache-proxy /bin/cache-proxy
 WORKDIR /
 VOLUME /data