The Library of Parliament catalogues material in English and French, using three controlled vocabularies for subject analysis (LCSH, CSH and RVM). In 2021, Library and Archives Canada began revising Canadian Subject Headings for describing material with Indigenous content. This presentation will cover the work undertaken by the Library of Parliament's Information Description team to implement these changes at the Library of Parliament, both from a policy and from a technical perspective. It will also discuss ongoing work to ensure that the catalogue is using the most current subject terminology to describe Indigenous content.