diff --git a/Doc/sphinx/TODO b/Doc/sphinx/TODO
index 3f6d332..387d933 100644
--- a/Doc/sphinx/TODO
+++ b/Doc/sphinx/TODO
@@ -21,3 +21,4 @@
 -   Write mmlref/ article (only for developers of Simba)
 -   Write tutorial?
 -   Fix up articles?
+-   Write about Simba Stable/Unstable.