# Windows Installer Signing Change

**URL:** <https://community.jenkins.io/t/windows-installer-signing-change/36842>\
**Category:** announcement\
**Tags:** sig-platform\
**Created:** [April 28, 2026, 10:57pm UTC](https://community.jenkins.io/t/windows-installer-signing-change/36842 "2026-04-28T22:57:10Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![MarkEWaite](https://dub1.discourse-cdn.com/flex013/user_avatar/community.jenkins.io/markewaite/32/20_2.png) [@MarkEWaite](https://community.jenkins.io/u/MarkEWaite)\
**Post date:** [April 28, 2026, 10:57pm UTC](https://community.jenkins.io/t/windows-installer-signing-change/36842/1 "2026-04-28T22:57:11Z")

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The MSI installer for Jenkins 2.562 and later is signed with a new organization, LF Open Source, LLC and a new signing key. There are known issues with the user experience because Microsoft Defender Smartscreen intentionally presents a warning dialog for unfamiliar installers, even when they are signed with valid certificates.

Additional details are in the [Jenkins 2.562 changelog](https://www.jenkins.io/changelog/2.562/) and in a blog post:

> **[Jenkins 2.562 and 2.555.2: Signed by LF Open Source, LLC](https://www.jenkins.io/blog/2026/04/29/windows-installer-signing-change/)**
>
> This article announces new signing of the Windows installer. Windows installer signing changes with the release of Jenkins weekly 2.562 and Jenkins LTS 2.555.3. The previous Windows installer signing keys will not be used after the release of Jenkins...

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**Author:** ![jodove](https://avatars.discourse-cdn.com/v4/letter/j/c37758/32.png) [@jodove](https://community.jenkins.io/u/jodove)\
**Post date:** [April 29, 2026, 12:34pm UTC](https://community.jenkins.io/t/windows-installer-signing-change/36842/2 "2026-04-29T12:34:32Z")

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Mark.

Thanks for the alert on that.

Does that mean Jenkins is going Open Source now ?

~ John

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**Author:** ![MarkEWaite](https://dub1.discourse-cdn.com/flex013/user_avatar/community.jenkins.io/markewaite/32/20_2.png) [@MarkEWaite](https://community.jenkins.io/u/MarkEWaite)\
**Post date:** [April 29, 2026, 4:37pm UTC](https://community.jenkins.io/t/windows-installer-signing-change/36842/3 "2026-04-29T16:37:41Z")

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> [@jodove](#):
>
> Does that mean Jenkins is going Open Source now ?

I’m not sure that I understand the question.

Jenkins has been open source since it was created. Yes, Jenkins is still open source and will continue to be open source.

We’re deeply grateful for organizations that contribute to Jenkins and we’re especially grateful to CloudBees and the customers of CloudBees that have sponsored significant Jenkins development for many years.