diff --git a/TODO.md b/TODO.md
index 0246435..fd226d8 100644
--- a/TODO.md
+++ b/TODO.md
@@ -40,6 +40,12 @@
   scrape requests I suppose.
 
 ## aquatic_ws
+* panic when unwrapping peer_address after peer closes connection:
+
+```
+thread 'socket-01' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 22, kind: InvalidInput, message: "Invalid argument" }', aquatic_ws/src/lib/network/connection.rs:28:59
+```
+
 * websocket_max_frame_size should be at least something like 64 * 1024,
   maybe put it and message size at 128k just to be sure
 * test transfer, specifically ipv6/ipv4 mapping