diff --git a/README.md b/README.md
index 1373348..5a0c876 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,7 @@ This project will help you quickly implement JAMStack service with TypeScript-fr
 Run the development server:
 
 ```bash
+yarn
 yarn dev
 ```
 
@@ -92,4 +93,4 @@ I'm not familiar with React and Next.js, so if you have any suggestions for reso
 
 ## Author
 
-Twitter: [@Meijin_garden](https://twitter.com/Meijin_garden)
\ No newline at end of file
+Twitter: [@Meijin_garden](https://twitter.com/Meijin_garden)