diff --git a/README.md b/README.md
index 268ab9db6..14d179976 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,8 @@ For languages other than Solidity, use the `data-lang` attribute, for example: `
 
 We welcome contributions from the community! Here's how you can get involved:
 
+> **Prerequisites:** This project requires [Node.js](https://nodejs.org/) and Yarn Classic (v1.x). Run `npm install --global yarn@1` before setup.
+
 1. Fork the repository
 2. Create your feature branch
 3. Commit your changes