diff --git a/TODO.md b/TODO.md
index aea5bac..bdb4f23 100644
--- a/TODO.md
+++ b/TODO.md
@@ -26,7 +26,7 @@ Do something about Akkoma and Misskey's quoted replies (they use the `quoteUrl`
 
 Add more CSS classes according to https://comam.es/snac/grunfink/p/1705598619.090050
 
-Add support for /share?text=tt&website=url (whatever it is).
+Add support for /share?text=tt&website=url (whatever it is, see https://mastodonshare.com/ for details).
 
 Add support for /authorize_interaction (whatever it is).