diff --git a/vocab/categories.json b/vocab/categories.json
index 879aacf1..08d0633a 100644
--- a/vocab/categories.json
+++ b/vocab/categories.json
@@ -194,6 +194,9 @@
       "controlledTerms:ModificationForm",
       "controlledTerms:ModificationScope"
     ],
+    "personIdentifier": [
+      "core:ORCID"
+    ],
     "publicationReference": [
       "core:DOI",
       "core:HANDLE",
@@ -797,4 +800,4 @@
       "controlledTerms:Technique"
     ]
   }
-}
\ No newline at end of file
+}