diff --git a/TODO b/TODO
index ad2e1f6beaa2ad5c4ea94d3ea12aedbc943246f7..7f707822f5bd6110a5fb0f4c643e31e55a9110b5 100644
--- a/TODO
+++ b/TODO
@@ -78,3 +78,6 @@ Roughly in order of importance.                                     -*-org-*-
 
 * Make an option for plotting hoppings as arcs, in order for overlapping
   hoppings to be distinguishable. Also potentially add arrows to the hoppings.
+
+* Adopt mincut/maxflow algorithm from networkx or python-graph to find the best
+  representation of a lead unit cell.