diff --git a/host_vars/tiffany b/host_vars/tiffany
index 2c0ce7b4d57bfb3d5ac9db26451a3f9397226c38..77140dbcdb9b4de5197319b30c2f40f8d2ed09e2 100644
--- a/host_vars/tiffany
+++ b/host_vars/tiffany
@@ -6,15 +6,15 @@ motd_lines:
   - "Öffentliche IPs: {{ansible_enp35s0.ipv4.address}} / {{ansible_enp35s0.ipv6[0].address}}"
 
 debian_sources: 
-  - "deb http://ftp2.de.debian.org/debian/ bullseye main contrib non-free"
-  - "deb http://ftp.debian.org/debian bullseye-updates main contrib non-free"
-  - "deb http://security.debian.org/ bullseye-security main contrib non-free"
-  - "deb http://download.proxmox.com/debian/pve bullseye pve-no-subscription"
+  - "deb http://ftp2.de.debian.org/debian/ bookworm main contrib non-free"
+  - "deb http://ftp.debian.org/debian bookworm-updates main contrib non-free"
+  - "deb http://security.debian.org/ bookworm-security main contrib non-free"
+  - "deb http://download.proxmox.com/debian/pve bookworm pve-no-subscription"
 
 debian_keys_id:
 
 debian_keys_url:
-  - "http://download.proxmox.com/debian/proxmox-release-bullseye.gpg"
+  - "http://download.proxmox.com/debian/proxmox-release-bookworm.gpg"
 
 
 # Art des Hosts: physical, vm, docker 
diff --git a/host_vars/verwaltung b/host_vars/verwaltung
index 16ae301f8d3c5d0299b87a47dbcbf71660d79208..b6ca5b649270b51c712416d55a7ec00a2e277842 100644
--- a/host_vars/verwaltung
+++ b/host_vars/verwaltung
@@ -6,10 +6,10 @@ motd_lines:
   - "Öffentliche IPs: {{ansible_ens18.ipv4.address}} / {{ansible_ens18.ipv6[0].address}}"
 
 debian_sources: 
-  - "deb http://ftp2.de.debian.org/debian/ bullseye main contrib non-free"
-  - "deb http://ftp.debian.org/debian bullseye-updates main contrib non-free"
-  - "deb http://security.debian.org/ bullseye-security main contrib non-free"
-  - "deb https://download.docker.com/linux/debian bullseye stable"
+  - "deb http://ftp2.de.debian.org/debian/ bookworm main contrib non-free"
+  - "deb http://ftp.debian.org/debian bookworm-updates main contrib non-free"
+  - "deb http://security.debian.org/ bookworm-security main contrib non-free"
+  - "deb https://download.docker.com/linux/debian bookworm stable"
 
 debian_keys_id:
   
diff --git a/host_vars/webserver b/host_vars/webserver
index 023c07e1fae068e465165e3ab273e7f7f66808fb..fe0b27d53326602c061acb1e48d2de9eeca9fcc0 100644
--- a/host_vars/webserver
+++ b/host_vars/webserver
@@ -6,10 +6,10 @@ motd_lines:
   - "Öffentliche IPs: {{ansible_ens18.ipv4.address}} / {{ansible_ens18.ipv6[0].address}}"
 
 debian_sources: 
-  - "deb http://ftp2.de.debian.org/debian/ bullseye main contrib non-free"
-  - "deb http://ftp.debian.org/debian bullseye-updates main contrib non-free"
-  - "deb http://security.debian.org/ bullseye-security main contrib non-free"
-  - "deb https://download.docker.com/linux/debian bullseye stable"
+  - "deb http://ftp2.de.debian.org/debian/ bookworm main contrib non-free"
+  - "deb http://ftp.debian.org/debian bookworm-updates main contrib non-free"
+  - "deb http://security.debian.org/ bookworm-security main contrib non-free"
+  - "deb https://download.docker.com/linux/debian bookworm stable"
 
 debian_keys_id: