diff --git a/test/merge_debian_isos b/test/merge_debian_isos
index 83508d39..5aa66137 100755
--- a/test/merge_debian_isos
+++ b/test/merge_debian_isos
@@ -80,6 +80,7 @@ usage() {
   echo "                    debian-11.2.0-amd64-DVD-[12345].iso" >&2
   echo "This leads to the first two steps of the xorriso-dd-target device" >&2
   echo "plug dialog. See: https://wiki.debian.org/XorrisoDdTarget" >&2
+  echo 'Finally input "yes" is required to authorize xorriso under sudo.' >&2
   echo "  rmdir merge_mount" >&2
 }
 
diff --git a/test/merge_debian_isos.sig b/test/merge_debian_isos.sig
index 824fa7a5..713ec218 100644
Binary files a/test/merge_debian_isos.sig and b/test/merge_debian_isos.sig differ