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Shopify fix guide

HSTS max-age Too Short on Shopify

HSTS header is present but max-age is under 1 year. Browsers will not cache the HTTPS preference long enough for reliable protection.

Issue ID: SEC-HSTS-002Severity: minorEffort: S

Why this matters

HSTS header is present but max-age is under 1 year. Browsers will not cache the HTTPS preference long enough for reliable protection. This affects browser trust signals and whether visitors feel safe submitting contact details.

Shopify fix path

How to fix this on Shopify

Use theme settings, page settings, or theme code.

  1. 1Find the source of the issue in Shopify admin.
  2. 2Apply the change.
  3. 3Preview and publish.

After you fix it

  • Check that max-age is at least 31536000

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