diff --git a/TODO b/TODO
index 9d633a6..da31f39 100644
--- a/TODO
+++ b/TODO
@@ -6,3 +6,4 @@
 * 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
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