diff --git a/Dockerfile b/Dockerfile
index 99907d9..7d38aae 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,9 +8,11 @@ RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o /src/serial/main
 
 FROM debian:bookworm-slim
 
-RUN export DEBIAN_FRONTEND=noninteractive && \
-    apt-get update && apt-get -y upgrade && \
-    apt-get --no-install-recommends -y install \
+ARG DEBCONF_NOWARNINGS="yes"
+ARG DEBIAN_FRONTEND noninteractive
+
+RUN apt-get update && apt-get -y upgrade && \
+	apt-get --no-install-recommends -y install \
 	curl \
 	cpio \
 	wget \