diff --git a/build-image b/build-image
index 78709200103a3015ec0e2454fa7cf5a2db1587cd..ec396a43d19914bc24042d834a51ba9548c1c011 100755
--- a/build-image
+++ b/build-image
@@ -245,9 +245,10 @@ sudo pureos_board="${pureos_board}" \
     --verbose --image "${mainimg}" --log "tmp/${mainimg}.log" --size 3800M  \
     --mirror "${mirror}" \
     --configure-apt \
+    --lock-root-password \
     --distribution "${debootstrap_dist}" \
     --serial-console-command "/sbin/getty -L ttymxc0 115200 vt100" \
-    --root-password='root' --hostname='pureos' --user=purism/123456 --sudo \
+    --hostname='pureos' --user=purism/123456 --sudo \
     --customize "${cwd}/root.sh" \
     --owner "$(whoami)" \
     "${custom_package_opt[@]}" \