# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
+
+## 0.7.3 (September 20, 2019)
+
+### Added
+
+- HTTP Proxy support. (Pulls #259, #353)
+- Add Digest authentication. (Pull #332)
+- Add `.build_request()` method to `Client` and `AsyncClient`. (Pull #319)
+- Add `.elapsed` property on responses. (Pull #351)
+- Add support for `SSLKEYLOGFILE` in Python 3.8b4+. (Pull #301)
+
+### Removed
+
+- Drop NPN support for HTTP version negotiation. (Pull #314)
+
+### Fixed
+
+- Fix distribution of type annotations for mypy (Pull #361).
+- Set `Host` header when redirecting cross-origin. (Pull #321)
+- Drop `Content-Length` headers on `GET` redirects. (Pull #310)
+- Raise `KeyError` if header isn't found in `Headers`. (Pull #324)
+- Raise `NotRedirectResponse` in `response.next()` if there is no redirection to perform. (Pull #297)
+- Fix bug in calculating the HTTP/2 maximum frame size. (Pull #153)
+
## 0.7.2 (August 28, 2019)
- Enforce using `httpx.AsyncioBackend` for the synchronous client. (Pull #232)