diff --git a/debian.cfg b/debian.cfg
index 36e8c11..9c30ba3 100644
--- a/debian.cfg
+++ b/debian.cfg
@@ -1,5 +1,7 @@
 # shellcheck disable=SC2148,SC2154
 # https://www.debian.org/releases/stable/amd64/apbs04.zh-cn.html
+# https://www.debian.org/releases/stable/example-preseed.txt
+# https://preseed.debian.net/debian-preseed/bookworm/amd64-main-full.txt
 
 # B.4.1. 本地化
 d-i debian-installer/locale string en_US
@@ -39,10 +41,11 @@ d-i partman-basicfilesystems/no_swap boolean true
 # B.4.8. 基本系统安装
 
 # B.4.9. 设置 apt
-d-i apt-setup/non-free boolean true
-d-i apt-setup/contrib boolean true
+d-i apt-setup/non-free boolean false
+d-i apt-setup/non-free-firmware boolean true
+d-i apt-setup/contrib boolean false
 d-i apt-setup/enable-source-repositories boolean false
-d-i apt-setup/services-select multiselect security, updates, backports
+d-i apt-setup/services-select multiselect security, updates
 d-i apt-setup/security_host string security.debian.org
 
 # B.4.10. 选择软件包