diff --git a/TODO b/TODO
index 971bbd2a..44d78a2b 100644
--- a/TODO
+++ b/TODO
@@ -12,3 +12,4 @@
 * Query resource by location
 * List available os, version, etc for metalink
 * ipv6(RFC2428 for ftp)
+* async DNS using ares or c-ares