I am pleased to inform that Qt 5.9.4 is released today. As a patch release Qt 5.9.4 does not add any new functionality, but provides many bug fixes and other improvements.

Compared to Qt 5.9.3, the new Qt 5.9.4 contains nearly 200 bug fixes and in total more than 500 changes since Qt 5.9.3. For details of the most important changes, please check the Change files of Qt 5.9.4.

Qt 5.9 LTS is soon moving to 'Strict' phase (after Qt 5.11 is branched from dev). It continues to receive important bug fixes and significant performance fixes still during the 'Strict' phase. We also continue to create new Qt 5.9.x patch releases. Next patch release, Qt 5.9.5, is planned to be released end of March 2018.

Qt 5.9.4 can be updated to using the maintenance tool of the online installer. For new installations, please download latest online installer from Qt Account portal or from qt.io Download page. Offline packages are available for commercial users in the Qt Account portal and at the qt.io Download page for open-source users.