diff --git a/TODO.md b/TODO.md
index 022882d..fbdc81f 100644
--- a/TODO.md
+++ b/TODO.md
@@ -10,9 +10,9 @@
   * test tls
   * current serialized byte strings valid
 * scrape: does it work with multiple hashes?
-* non-compact peers for ipv6 generally: use ResponsePeerList enum
-* on ipv6, compact=1 should result in error response
-* on ipv4, compact=0 should result in error response
+* ipv6 response peers: use https://www.bittorrent.org/beps/bep_0007.html?
+  (peers6 compact key)
+  * compact=0 should result in error response
 * tests of request parsing
 * tests of response serialization (against data known to be good would be nice)
 * Connection.send_response: handle case when all bytes are not written: can