diff --git a/Dockerfile b/Dockerfile
index a09c65f..ec74d2e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@ FROM ubuntu:focal
 LABEL author="https://github.com/aBARICHELLO/godot-ci/graphs/contributors"
 
 USER root
-ARG DEBIAN_FRONTEND=noninteractive
+ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update && apt-get install -y --no-install-recommends \
     ca-certificates \
     git \
diff --git a/mono.Dockerfile b/mono.Dockerfile
index 7da1ece..c55aa50 100644
--- a/mono.Dockerfile
+++ b/mono.Dockerfile
@@ -2,7 +2,7 @@ FROM mono:latest
 LABEL author="https://github.com/aBARICHELLO/godot-ci/graphs/contributors"
 
 USER root
-ARG DEBIAN_FRONTEND=noninteractive
+ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update && apt-get install -y --no-install-recommends \
     ca-certificates \
     git \