diff --git a/Dockerfile.debian-stable-slim b/Dockerfile.debian-stable-slim
index 316ab259..61c67e60 100644
--- a/Dockerfile.debian-stable-slim
+++ b/Dockerfile.debian-stable-slim
@@ -1,4 +1,4 @@
-FROM --platform=$BUILDPLATFORM golang:1.22-alpine as builder
+FROM --platform=$BUILDPLATFORM golang:1.22-alpine AS builder
 
 RUN apk add --no-cache make git
 WORKDIR /workspace/helmfile
@@ -14,7 +14,7 @@ RUN make static-${TARGETOS}-${TARGETARCH}
 
 FROM debian:stable-slim
 
-LABEL org.opencontainers.image.source https://github.com/helmfile/helmfile
+LABEL org.opencontainers.image.source=https://github.com/helmfile/helmfile
 
 RUN apt update -qq && \
     apt install --no-install-recommends -y \
@@ -110,4 +110,4 @@ RUN chmod 751 ${HOME}
 
 COPY --from=builder /workspace/helmfile/dist/helmfile_${TARGETOS}_${TARGETARCH} /usr/local/bin/helmfile
 
-CMD ["/usr/local/bin/helmfile"]
+CMD ["/usr/local/bin/helmfile"]
\ No newline at end of file
diff --git a/Dockerfile.ubuntu b/Dockerfile.ubuntu
index a592b463..743e7d78 100644
--- a/Dockerfile.ubuntu
+++ b/Dockerfile.ubuntu
@@ -1,4 +1,4 @@
-FROM --platform=$BUILDPLATFORM golang:1.22-alpine as builder
+FROM --platform=$BUILDPLATFORM golang:1.22-alpine AS builder
 
 RUN apk add --no-cache make git
 WORKDIR /workspace/helmfile
@@ -14,7 +14,7 @@ RUN make static-${TARGETOS}-${TARGETARCH}
 
 FROM ubuntu:20.04
 
-LABEL org.opencontainers.image.source https://github.com/helmfile/helmfile
+LABEL org.opencontainers.image.source=https://github.com/helmfile/helmfile
 
 RUN apt update -qq && \
     apt install --no-install-recommends -y \