diff --git a/1_setup_docker_apt_repo.sh b/1_setup_docker_apt_repo.sh
index 098bbf4..3b1c6a6 100755
--- a/1_setup_docker_apt_repo.sh
+++ b/1_setup_docker_apt_repo.sh
@@ -3,8 +3,8 @@
 # REF:https://docs.docker.com/engine/install/debian/#install-using-the-repository
 
 # Add Docker's official GPG key:
-apt-get update
-apt-get install ca-certificates curl gnupg
+apt -y update
+apt -y install ca-certificates curl gnupg
 install -m 0755 -d /etc/apt/keyrings
 curl -fsSL https://download.docker.com/linux/debian/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
 chmod a+r /etc/apt/keyrings/docker.gpg
@@ -14,4 +14,4 @@ echo \
   "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian \
   "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \
   tee /etc/apt/sources.list.d/docker.list > /dev/null
-apt-get update
+apt -y update