diff --git a/TODO.md b/TODO.md
index d0ca4bfe0..c2f935b89 100644
--- a/TODO.md
+++ b/TODO.md
@@ -42,3 +42,4 @@ Major Features:
 * Sixels: https://saitoha.github.io/libsixel/
 * Kitty keyboard protocol: https://sw.kovidgoyal.net/kitty/keyboard-protocol/
 * Kitty graphics protocol: https://sw.kovidgoyal.net/kitty/graphics-protocol/
+* Colored/styled underlines: https://sw.kovidgoyal.net/kitty/underlines/