diff --git a/ct/zammad.sh b/ct/zammad.sh
index 2c582cce92..108a6c1d73 100644
--- a/ct/zammad.sh
+++ b/ct/zammad.sh
@@ -11,7 +11,7 @@ var_disk="${var_disk:-8}"
 var_cpu="${var_cpu:-2}"
 var_ram="${var_ram:-4096}"
 var_os="${var_os:-debian}"
-var_version="${var_version:-13}"
+var_version="${var_version:-12}"
 var_unprivileged="${var_unprivileged:-1}"
 
 header_info "$APP"
diff --git a/frontend/public/json/zammad.json b/frontend/public/json/zammad.json
index ebfec92c3e..a892db7cc2 100644
--- a/frontend/public/json/zammad.json
+++ b/frontend/public/json/zammad.json
@@ -23,7 +23,7 @@
         "ram": 4096,
         "hdd": 8,
         "os": "debian",
-        "version": "13"
+        "version": "12"
       }
     }
   ],
diff --git a/install/zammad-install.sh b/install/zammad-install.sh
index 69712c4a69..6c291a2479 100644
--- a/install/zammad-install.sh
+++ b/install/zammad-install.sh
@@ -21,15 +21,12 @@ $STD apt install -y \
 msg_ok "Installed Dependencies"
 
 msg_info "Setting up Elasticsearch"
-curl -fsSL https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo gpg --dearmor -o /usr/share/keyrings/elasticsearch-keyring.gpg
-cat <<EOF | sudo tee /etc/apt/sources.list.d/elasticsearch.sources >/dev/null
-Types: deb
-URIs: https://artifacts.elastic.co/packages/7.x/apt
-Suites: stable
-Components: main
-Signed-By: /usr/share/keyrings/elasticsearch-keyring.gpg
-EOF
-$STD apt update
+setup_deb822_repo \
+  "elasticsearch" \
+  "https://artifacts.elastic.co/GPG-KEY-elasticsearch" \
+  "https://artifacts.elastic.co/packages/7.x/apt" \
+  "stable" \
+  "main"
 $STD apt -y install elasticsearch
 echo "-Xms2g" >>/etc/elasticsearch/jvm.options
 echo "-Xmx2g" >>/etc/elasticsearch/jvm.options
@@ -39,15 +36,12 @@ systemctl restart -q elasticsearch
 msg_ok "Setup Elasticsearch"
 
 msg_info "Installing Zammad"
-curl -fsSL https://dl.packager.io/srv/zammad/zammad/key | gpg --dearmor | sudo tee /etc/apt/keyrings/pkgr-zammad.gpg >/dev/null
-cat <<EOF | sudo tee /etc/apt/sources.list.d/zammad.sources >/dev/null
-Types: deb
-URIs: https://dl.packager.io/srv/deb/zammad/zammad/stable/debian
-Suites: 12
-Components: main
-Signed-By: /etc/apt/keyrings/pkgr-zammad.gpg
-EOF
-$STD apt update
+setup_deb822_repo \
+  "zammad" \
+  "https://dl.packager.io/srv/zammad/zammad/key" \
+  "https://dl.packager.io/srv/deb/zammad/zammad/stable/debian" \
+  "$(get_os_info version_id)" \
+  "main"
 $STD apt -y install zammad
 $STD zammad run rails r "Setting.set('es_url', 'http://localhost:9200')"
 $STD zammad run rake zammad:searchindex:rebuild