diff --git a/src/enums/MDNodaRepository.php b/src/enums/MDNodaRepository.php
index ce50f0f..c059270 100644
--- a/src/enums/MDNodaRepository.php
+++ b/src/enums/MDNodaRepository.php
@@ -98,6 +98,7 @@ enum MDNodaRepository implements MDValueEnumInterface, JsonSerializable {
             'ulan'      => self::ulan,
             'ULAN'      => self::ulan,
             'viaf'      => self::viaf,
+            'VIAF'      => self::viaf,
             'wikidata'  => self::wikidata,
             'Wikidata'  => self::wikidata,
             'www.wikidata.org' => self::wikidata,