diff --git a/src/todo.txt b/src/todo.txt
index ef349eb..5d4f348 100644
--- a/src/todo.txt
+++ b/src/todo.txt
@@ -1,3 +1,4 @@
+- valgrind -a; key level scanning memory leaks
 - Maybe a singular, preset M_0 sending node. Test for performance issues.
 - Create dot output for arachne attacks
 - To store attacks for arachne, maybe the following is needed: