Update README.md

fehguy · web-flow · commit a83a1ce5f2f1 · 2017-01-13T09:34:03.000-08:00
diff --git a/README.md b/README.md
@@ -43,7 +43,8 @@ Swagger UI works in all evergreen desktop browsers (Chrome, Safari, Firefox). In
 ### Build
 You can rebuild swagger-ui on your own to tweak it or just so you can say you did.  To do so, follow these steps:
 
-### Windows Users: Please install [Python](https://www.python.org/downloads/windows/) before following the guidelines below for node-gyp rebuild to run.
+* Ensure you have `nodejs` 4.0 or greater installed, and on your classpath.
+* Windows Users: Please install [Python](https://www.python.org/downloads/windows/) before following the guidelines below for node-gyp rebuild to run.
 
 1. `npm install`
 2. `npm run build`
