diff --git a/notes.md b/notes.md
index 9adf763..5519084 100644
--- a/notes.md
+++ b/notes.md
@@ -12,3 +12,4 @@
   * ~~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/)~~
+  * investigate [gzip encoding](https://stackoverflow.com/questions/36383227/avoid-downloading-images-using-beautifulsoup-and-urllib-request)
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