An update the the Commentary to the GDPR published in 2020 by Oxford University Press has been published online as a free PDF document by its editors, Prof. Christopher Kuner (co-Director of the Hub), Prof. Lee A. Bygrave, Christopher Docksey, Luca Tosoni, and Laura Drechsler (a member of the Hub). The document, which comprises 332 pages, provides an update for 49 selected articles of the GDPR, and covers the period between 1 August 2019 and 1 January 2021.