diff --git a/README.md b/README.md
index 81d604fd60ea9e1863bce26934d5f9866bc0e7df..b9f4829b08635d983d2860b578f0134dd846c87a 100644
--- a/README.md
+++ b/README.md
@@ -98,7 +98,7 @@ export const API_DOC = "http://localhost:8080/";
 
 1. Go to [ExpliClas Web Demo](/codigo/expliclas) and run `npm install` to get all dependencies.
 2. Run `npm install -g serve` to install a NodeJS server for deployment.
-3. Run `npm run build` to generate a web service ready to production.
+3. Run `npm run build` to generate a web service ready to production. (in windos you may need to run first `npm install react-scripts -g`)
 4. Run `serve -s -l PORT build` to run the web service in the specified PORT.
 
 #### NOTES: