diff --git a/helpers/make-localechooser b/helpers/make-localechooser
index 0970faf..6fd64d6 100644
--- a/helpers/make-localechooser
+++ b/helpers/make-localechooser
@@ -18,7 +18,7 @@
 #
 
 VERSION=2
-EXTERNAL='deb-src http://ftp.debian.org/debian bullseye main'
+EXTERNAL='deb-src http://ftp.debian.org/debian bookworm main'
 REPOKEY=0E98404D386FA1D9
 NETINST=true