# Upgrading Zulu OpenJDK for the Designer

**URL:** <https://forum.inductiveautomation.com/t/upgrading-zulu-openjdk-for-the-designer/110542>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [September 11, 2025, 2:22pm UTC](https://forum.inductiveautomation.com/t/upgrading-zulu-openjdk-for-the-designer/110542 "2025-09-11T14:22:39Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [September 11, 2025, 3:11pm UTC](https://forum.inductiveautomation.com/t/upgrading-zulu-openjdk-for-the-designer/110542/2 "2025-09-11T15:11:44Z")

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In `~/.ignition/clientlauncher-data/designer-launcher.json` you'll find entries for each Designer target defined in the launcher.

Each of these should have a `custom.jre.path` key/value pair that you can edit the value of to point to your custom Java install.

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