Qt 5.6.3 is a bug-fix release. It maintains both forward and backward compatibility (source and binary) with Qt 5.6.0. For more details, refer to the online documentation included in this distribution. The documentation is also available online: http://doc.qt.io/qt-5/index.html The Qt version 5.6 series is binary compatible with the 5.5.x series. Applications compiled for 5.5 will continue to run with 5.6. There were no changes in this module since previous release.