diff --git a/Setup-PDF.js-in-a-website.md b/Setup-PDF.js-in-a-website.md
index 98f6ff5..de3bd79 100644
--- a/Setup-PDF.js-in-a-website.md
+++ b/Setup-PDF.js-in-a-website.md
@@ -26,4 +26,4 @@ To use the library in your project add `require('pdfjs-dist')` to your file requ
 Refer to https://github.com/mozilla/pdf.js/tree/master/examples/webpack for a complete example.
 
 ## Build PDF.js from source
-After cloning PDF.js, you can build PDF.js from source by running the `gulp generic` command. This will create the built PDF.js in the `build` folder.
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+After cloning PDF.js, you can build PDF.js from source by running the `npx gulp generic` command. This will create the built PDF.js in the `build` folder.
\ No newline at end of file