Fastify 5.11.3

Breaking: Fastify 5.11.3 is here. Shipped August 8, 2026. One fix. No drama.

What Changed

• Version string corrected — The version reported inside fastify.js was wrong. Now it matches the real release.

That's it. A single-commit patch release.

Why It Matters

If your logging, telemetry, or health checks read fastify.version from the bundle, you may have been reporting 5.11.2 while running 5.11.3. This fixes that drift.

No API changes. No breaking changes. No new features.

Upgrade Notes

• Run your normal update command.
• Verify your reported version string afterward.
• Skip if you're on 5.11.2 and don't read the version — but why not.