diff --git a/TODO b/TODO
index da31f39..d226ec9 100644
--- a/TODO
+++ b/TODO
@@ -6,4 +6,5 @@
 * clean up install tree.
 * check if path contains "ghost", refused by ghost
 * go multi-instance ?
-* use shrink to fix dependencies version. cf. https://www.npmjs.org/doc/shrinkwrap.html
\ No newline at end of file
+* use shrink to fix dependencies version. cf. https://www.npmjs.org/doc/shrinkwrap.html
+* implement upgrade