A few days ago, the official release of the Open Source DICOM toolkit DCMTK 3.6.7 was tagged in the public git repository and is now available for download (binaries for some platforms still need to be prepared): https://dcmtk.org/download/dcmtk/dcmtk367/
Apart from bug fixes and the usual updates for the latest changes of the DICOM standard, a couple of new features have been added. See the official announcement for details.