## What's Changed * Return type of GetTraceId should be nullable by @maxsenft in https://github.com/khellang/Middleware/pull/169 ## New Contributors * @maxsenft made their first contribution in https://github.com/khellang/Middleware/pull/169 **Full Changelog**: https://github.com/khellang/Middleware/compare/v6.4.0...v6.4.1