diff --git a/README.md b/README.md
index c069f02..cb14c0d 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,7 @@ todo
 10. writeup in this README
 11. usage in this README
 12. specification definition
+    1.  Specification.md
 13. FileMap.md
 
 ## Changelog