diff --git a/src/proxmox-pbs/constants-service.conf b/src/proxmox-pbs/constants-service.conf
index e720f35..cf7b529 100644
--- a/src/proxmox-pbs/constants-service.conf
+++ b/src/proxmox-pbs/constants-service.conf
@@ -8,7 +8,7 @@
 # This file contains the project constants on service level
 
 # Debian Version, which will be installed
-LXC_TEMPLATE_VERSION="debian-11-standard"
+LXC_TEMPLATE_VERSION="debian-12-standard"
 
 # Create sharefs mountpoint
 LXC_MP="1"
diff --git a/src/proxmox-pbs/install-service.sh b/src/proxmox-pbs/install-service.sh
index 6bcfa59..249217a 100644
--- a/src/proxmox-pbs/install-service.sh
+++ b/src/proxmox-pbs/install-service.sh
@@ -15,7 +15,7 @@ cat << EOF > /etc/apt/sources.list.d/pbs-no-subscription.list
 deb http://download.proxmox.com/debian/pbs $(lsb_release -cs) pbs-no-subscription
 EOF
 
-wget https://enterprise.proxmox.com/debian/proxmox-release-bullseye.gpg -O /etc/apt/trusted.gpg.d/proxmox-release-bullseye.gpg
+wget -q -O - https://enterprise.proxmox.com/debian/proxmox-release-bookworm.gpg | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/proxmox-release-bookworm.gpg >/dev/null
 
 apt update && apt upgrade -y
 DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical apt install -y -o DPkg::options::="--force-confdef" -o DPkg::options::="--force-confold" proxmox-backup-server