# Licence key not working with version 8.2

**URL:** <https://pdfjs.community/t/licence-key-not-working-with-version-8-2/1310>\
**Category:** Technical Support\
**Created:** [January 19, 2022, 9:25am UTC](https://pdfjs.community/t/licence-key-not-working-with-version-8-2/1310 "2022-01-19T09:25:43Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![user60](https://avatars.discourse-cdn.com/v4/letter/u/90ced4/32.png) [@user60](https://pdfjs.community/u/user60)\
**Post date:** [January 20, 2022, 4:38pm UTC](https://pdfjs.community/t/licence-key-not-working-with-version-8-2/1310/5 "2022-01-20T16:38:24Z")

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I copied the new library alongside the other library folder. There shouldn’t be a problem. And my browser cache is disabled.

The link you provided is the plus version which is working without problems. I only need the viewer for our project. With the plus version i get the watermark and lot of functions we don’t need.

I tried the NPM and also the manual integration method for the viewer version. Both have the same problem with verifying the key.

> **[Integrating PDF.js Express Viewer with NPM | Documentation](https://pdfjs.express/documentation/get-started-viewer/npm)**

Thank you!

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