# Upgrade 3.x to 4.x for developers version

**URL:** <https://community.wowza.com/t/upgrade-3-x-to-4-x-for-developers-version/41403>\
**Category:** Wowza Streaming Engine\
**Created:** [March 27, 2014, 10:31am UTC](https://community.wowza.com/t/upgrade-3-x-to-4-x-for-developers-version/41403 "2014-03-27T10:31:44Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Wade\_DeWerff](https://avatars.discourse-cdn.com/v4/letter/w/b4bc9f/32.png) [@Wade\_DeWerff](https://community.wowza.com/u/Wade_DeWerff)\
**Post date:** [March 27, 2014, 10:31am UTC](https://community.wowza.com/t/upgrade-3-x-to-4-x-for-developers-version/41403/1 "2014-03-27T10:31:44Z")

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Will I need to request a new developer license if I upgrade from 3.x to 4.x?

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**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\
**Post date:** [March 27, 2014, 4:45pm UTC](https://community.wowza.com/t/upgrade-3-x-to-4-x-for-developers-version/41403/2 "2014-03-27T16:45:50Z")

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Yes, a new key is necessary.

Richard

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**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\
**Post date:** [March 27, 2014, 4:46pm UTC](https://community.wowza.com/t/upgrade-3-x-to-4-x-for-developers-version/41403/3 "2014-03-27T16:46:38Z")

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There is an [upgrade guide here](https://www.wowza.com/docs/how-to-upgrade-wowza-media-server-software-to-wowza-streaming-engine).

Richard