# SDK 11.4 to 12.1

**URL:** https://community.thunkable.com/t/sdk-11-4-to-12-1/64214
**Category:** Questions about Thunkable X
**Created:** [January 11, 2019, 5:27pm UTC](https://community.thunkable.com/t/sdk-11-4-to-12-1/64214 "2019-01-11T17:27:00Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![Conor](https://avatars.discourse-cdn.com/v4/letter/c/9d8465/32.png) [@Conor](https://community.thunkable.com/u/Conor)
#### Post date: [January 11, 2019, 5:42pm UTC](https://community.thunkable.com/t/sdk-11-4-to-12-1/64214/2 "2019-01-11T17:42:17Z")

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This has already been answered here:

> [@Starting March 2019, all iOS apps submitted to the App Store must be built with the iOS 12.1 SDK or later](http://community.thunkable.com/t/starting-march-2019-all-ios-apps-submitted-to-the-app-store-must-be-built-with-the-ios-12-1-sdk-or-later/63646/3):
>
> Don’t worry! We are working on it and it will be fixed before March 2019. Best, Wei

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