diff --git a/readme.md b/readme.md
index 7d6e3c9..08f857f 100644
--- a/readme.md
+++ b/readme.md
@@ -260,5 +260,6 @@ Handle project workflows in a unified way:
 ### Later
 
 * automate versions fetching
+* document behavior differences
 * generate graphs
 * turn readme into documentation