diff --git a/tests/packer/init/debian-server.user-data.yml b/tests/packer/init/debian-server.user-data.yml
index 59134f22..ef6bd719 100644
--- a/tests/packer/init/debian-server.user-data.yml
+++ b/tests/packer/init/debian-server.user-data.yml
@@ -31,13 +31,13 @@ packages:
 
 runcmd:
   - apt-get update -y
-  - apt-get install -y -t bullseye-backports golang-go
+  - apt-get install -y -t bookworm-backports golang-go
 
 write_files:
 
   - path: /etc/apt/sources.list
     append: true
-    content: deb http://deb.debian.org/debian bullseye-backports main contrib non-free
+    content: deb http://deb.debian.org/debian bookworm-backports main contrib non-free
 
   # Network configuration
   - path: /etc/systemd/network/20-wired.network