diff --git a/cd.sh b/cd.sh
index 1880d9a..4121f9a 100644
--- a/cd.sh
+++ b/cd.sh
@@ -16,9 +16,11 @@ echo '
  2/11 configure package manager
 '
 echo -n "\
+Acquire::Check-Valid-Until True;
 APT::Get::Show-Versions True;
 APT::Install-Recommends False;
 APT::Install-Suggests False;
+Dir::Etc::SourceParts '';
 " > '/etc/apt/apt.conf.d/apt.conf' \
 || exit
 echo '
@@ -26,8 +28,8 @@ echo '
 '
 echo -n "\
 deb https://deb.debian.org/debian bookworm main
-deb https://deb.debian.org/debian-backports bookworm main
-deb https://deb.debian.org/debian-updates bookworm main
+deb https://deb.debian.org/debian bookworm-backports main
+deb https://deb.debian.org/debian bookworm-updates main
 deb https://deb.debian.org/debian-security bookworm-security main
 " > '/etc/apt/sources.list' \
 || exit