> For the complete documentation index, see [llms.txt](https://support.storefront.co.za/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.storefront.co.za/release-notes/june-2026/non-ascii-header-validation.md).

# Non-ASCII Header Validation

Fixed an issue where requests containing non-ASCII characters in their headers caused a server error; such requests now correctly receive a standard bad-request response instead.

**How it benefits the Merchant**

This prevents malformed requests from causing unexpected server errors, improving platform stability and making error handling more predictable for integrations.

**Potential FAQs**

Q: Does this affect normal customer traffic?

A: Unlikely — this affects requests with non-ASCII characters in headers, which is an edge case rather than typical customer traffic.

Q: Do I need to update any integrations because of this?

A: Check with your account manager if you have custom integrations sending non-standard headers; otherwise no action is needed.