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title: Pebble SDK 4.2.1 - Changelog
date: 2016-10-19
---

This is a hotfix for [SDK 4.2](/sdk/changelogs/4.2/). No corresponding firmware exists.

### Changes to Firmware

None.

### Changes to SDK

* Removed the use of `eval` in JavaScript bundling that was causing incorrect behavior
  when running in the emulator and on iOS.

### Known issues

* JavaScript errors do not have a useful filename or line number. You may find it helpful
  to look up the line in build/pebble-js-app.js to determine what the error is referring to.