diff --git a/README.md b/README.md
index 91c6944..96abb6b 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,11 @@
-# きせつのはぐるま
-
 [![UnitTest](https://github.com/fairy-rockets/the-gear-of-seasons/actions/workflows/unit-test.yml/badge.svg)](https://github.com/fairy-rockets/the-gear-of-seasons/actions/workflows/unit-test.yml)
+
+# the gear of seasons (季節の歯車)
+
+[Visit](https://hexe.net/).
+
+## Pre-requirements
+
+ - node.js 14.0 or higher.
+ - ffmpeg
+