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title: Pebble SDK 4.2-beta5 - Changelog
date: 2016-10-14
---

This is a developer preview for SDK 4.2. No firmware is provided.

### Changes to Firmware

* Rocky.js: assorted postMessage fixes.


### Changes to SDK

* Fixed apps that use an external bundler and expect `require` to exist at runtime.
  * This also fixes Clay.