diff --git a/README.md b/README.md
index 583fddf..e3969d6 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,9 @@
-## diff tool
+## Difftron - diff tool based on Electron
 
 ![difftron](./docs/difftron.gif)
 
 ### 開発
+
+```
 yarn run dev
+```