diff --git a/install/proxmox-backup-server-install.sh b/install/proxmox-backup-server-install.sh
index 054a2d842..5564500d9 100644
--- a/install/proxmox-backup-server-install.sh
+++ b/install/proxmox-backup-server-install.sh
@@ -14,11 +14,12 @@ network_check
 update_os
 
 msg_info "Installing Proxmox Backup Server"
-curl -fsSL "https://enterprise.proxmox.com/debian/proxmox-release-trixie.gpg" -o "/etc/apt/trusted.gpg.d/proxmox-release-trixie.gpg"
-cat <<EOF >>/etc/apt/sources.list
-deb https://download.proxmox.com/debian/pbs trixie pbs-no-subscription
-EOF
-$STD apt update
+setup_deb822_repo \
+  "proxmox-backup-server" \
+  "https://enterprise.proxmox.com/debian/proxmox-archive-keyring-trixie.gpg" \
+  "http://download.proxmox.com/debian/pbs" \
+  "trixie" \
+  "pbs-no-subscription"
 export DEBIAN_FRONTEND=noninteractive
 export IFUPDOWN2_NO_IFRELOAD=1
 $STD apt install -y proxmox-backup-server