diff --git a/notes.md b/notes.md
index 1575f85..3225f8a 100644
--- a/notes.md
+++ b/notes.md
@@ -8,3 +8,5 @@
   * ignore any links which aren't to pages
   * better url checking to get bare domain
   * ~~remove base url from initial urls with and without trailing slash~~
+  * investigate using [tldextract](https://github.com/john-kurkowski/tldextract) to match urls
+  * implement parsing of [robots.txt](http://docs.w3cub.com/python~3.6/library/urllib.robotparser/)