# Supported way of adding "IncludeSubdomain" to STS headers

**URL:** https://meta.discourse.org/t/supported-way-of-adding-includesubdomain-to-sts-headers/393114
**Category:** Development
**Created:** [January 9, 2026, 9:47pm UTC](https://meta.discourse.org/t/supported-way-of-adding-includesubdomain-to-sts-headers/393114 "2026-01-09T21:47:14Z")
**Posts on this page:** 1
**Showing post:** 6

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### Author: ![pfaffman](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/pfaffman/32/120154_2.png) [@pfaffman](https://meta.discourse.org/u/pfaffman)
#### Post date: [January 10, 2026, 11:55pm UTC](https://meta.discourse.org/t/supported-way-of-adding-includesubdomain-to-sts-headers/393114/6 "2026-01-10T23:55:26Z")

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> [@supermathie](#):
>
> The easiest option is probably editing `templates/web.ssl.template.yml` with the new values you want.

I would do that first since it’s easiest. Once you figure it out, the next easiest thing is to copy that file somewhere else so that you don’t have issues with git conflicting with it. The best solution would be to combine your current strategy with another line to remove the other conflicting setting.

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