diff --git a/todo.txt b/todo.txt
index 490f5a9..e650b5d 100644
--- a/todo.txt
+++ b/todo.txt
@@ -1,2 +1,3 @@
 //- Basic scene parsing with triangle meshes.
+- Multi-threaded rendering.
 - Unit tests for scene parsing.
\ No newline at end of file