diff --git a/TODO.md b/TODO.md
index 1b67f97..e2189d2 100644
--- a/TODO.md
+++ b/TODO.md
@@ -58,7 +58,7 @@
 - [ ] trigger success topbar when we have completed a milestone on chart page; show plain when we are behind
 - [ ] on chart page show a little progress bar in the title
 - [ ] use tap plugin for `Ractive`
-- [ ] the app bundle (albeit uncompressed) clocks in at 1.5MB, reduce the size (`d3` is huge, `localForage` not nedded)
+- [ ] the app bundle (albeit uncompressed) clocks in at 1.5MB, reduce the size (`d3` is huge (use [grunt-smash](https://github.com/cvisco/grunt-smash), [docs here](https://github.com/mbostock/smash/wiki)), `localForage` not nedded)
 - [ ] make tests work again
 - [ ] use minified builds in production
 - [ ] move project to Assembly