# What’s new in Tornado 6.5.2

## Aug 8, 2025

### Bug fixes

- Fixed a bug that resulted in WebSocket pings not being sent at the configured interval.

- Improved logging for invalid `Host` headers. This was previously logged as an uncaught exception with a stack trace, now it is simply a 400 response (logged as a warning in the access log).

- Restored the `host` argument to `HTTPServerRequest`. This argument is deprecated and will be removed in the future, but its removal with no warning in 6.5.0 was a mistake.

- Removed a debugging print statement that was left in the code.

- Improved type hints for `gen.multi`.