diff --git a/src/debian/Containerfile b/src/debian/Containerfile
index f65bc67..2326dc3 100644
--- a/src/debian/Containerfile
+++ b/src/debian/Containerfile
@@ -12,7 +12,6 @@ RUN rm /etc/localtime && \
     echo $TZ > /etc/timezone
 
 # Install packages
-ARG DEBIAN_FRONTEND=noninteractive
 RUN apt update -y 
 RUN apt upgrade -y
 RUN apt install -y init sudo wget nano less man-db unzip
diff --git a/src/mailserver/Containerfile b/src/mailserver/Containerfile
index 0d4d79f..626b541 100644
--- a/src/mailserver/Containerfile
+++ b/src/mailserver/Containerfile
@@ -22,6 +22,9 @@ ARG FILESUID=5000
 ### General Setup
 ###
 
+# tell debian not to ask questions during install process
+ARG DEBIAN_FRONTEND=noninteractive
+
 # install packages we want
 RUN apt update -y && apt install -y postfix dovecot-imapd dovecot-lmtpd