diff --git a/bookwyrm/activitypub/book.py b/bookwyrm/activitypub/book.py
index ee4b8851..6fa80b32 100644
--- a/bookwyrm/activitypub/book.py
+++ b/bookwyrm/activitypub/book.py
@@ -63,5 +63,7 @@ class Author(ActivityObject):
     aliases: List[str] = field(default_factory=lambda: [])
     bio: str = ''
     openlibraryKey: str = ''
+    librarythingKey: str = ''
+    goodreadsKey: str = ''
     wikipediaLink: str = ''
     type: str = 'Person'