# Invalid buffer module

**URL:** <https://talk.observablehq.com/t/invalid-buffer-module/1314>\
**Category:** Help\
**Created:** [October 12, 2018, 11:45am UTC](https://talk.observablehq.com/t/invalid-buffer-module/1314 "2018-10-12T11:45:38Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![nicola](https://yyz2.discourse-cdn.com/flex030/user_avatar/talk.observablehq.com/nicola/32/1039_2.png) [@nicola](https://talk.observablehq.com/u/nicola)\
**Post date:** [October 12, 2018, 11:45am UTC](https://talk.observablehq.com/t/invalid-buffer-module/1314/1 "2018-10-12T11:45:38Z")

</div>

I am trying to use this module:

> **[feross/buffer](https://github.com/feross/buffer)**
>
> The buffer module from node.js, for the browser. Contribute to feross/buffer development by creating an account on GitHub.

Unfortunately it tells me it is an invalid module, why?

I also tried requiring this: `Buffer = require('https://unpkg.com/buffer@5.2.1/index.js')` but still not working

---

<div class="post-metadata">

**Author:** ![mbostock](https://yyz2.discourse-cdn.com/flex030/user_avatar/talk.observablehq.com/mbostock/32/9_2.png) [@mbostock](https://talk.observablehq.com/u/mbostock)\
**Post date:** [October 12, 2018, 12:23pm UTC](https://talk.observablehq.com/t/invalid-buffer-module/1314/2 "2018-10-12T12:23:27Z")

</div>

Did you try the debugger?

> **[Module require debugger](https://beta.observablehq.com/@tmcw/module-require-debugger)**
>
> An Observable notebook by Tom MacWright.

---

<div class="post-metadata">

**Author:** ![nicola](https://yyz2.discourse-cdn.com/flex030/user_avatar/talk.observablehq.com/nicola/32/1039_2.png) [@nicola](https://talk.observablehq.com/u/nicola)\
**Post date:** [October 12, 2018, 1:53pm UTC](https://talk.observablehq.com/t/invalid-buffer-module/1314/3 "2018-10-12T13:53:16Z")

</div>

awesome it worked.