diff --git a/README.md b/README.md
index 9d43b76a7..0a148700e 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
 mruby-dir
-=========
\ No newline at end of file
+=========
+
+Note: mruby-dir requires iij/mruby now.