diff --git a/README.md b/README.md
index 2be13b2..bcaa501 100644
--- a/README.md
+++ b/README.md
@@ -84,3 +84,9 @@ You can try a calculator in __version 0.17~0.19__ !
 # Abstract Syntax Tree
 
 In __version 1.2__ the ast has been completed.
+
+# Version 2.0
+
+a completed ast-interpreter with unfinished lib functions.
+
+a new byte code interpreter is in progress(version 3.0).