diff --git a/README.md b/README.md
index cc6bbed..0ff7f2d 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ imcat also works on the latest version of Windows 10.
 
 ## Todo
 
--
+* Handle alpha-transparency. Requires reading the terminal background colour, somehow. Tricky.
 
 ## Done