diff --git a/bookwyrm/activitypub/book.py b/bookwyrm/activitypub/book.py
index 5db0dc3ac..a53222053 100644
--- a/bookwyrm/activitypub/book.py
+++ b/bookwyrm/activitypub/book.py
@@ -22,8 +22,6 @@ class BookData(ActivityObject):
     aasin: Optional[str] = None
     isfdb: Optional[str] = None
     lastEditedBy: Optional[str] = None
-    links: list[str] = field(default_factory=list)
-    fileLinks: list[str] = field(default_factory=list)
 
 
 # pylint: disable=invalid-name
@@ -45,6 +43,8 @@ class Book(BookData):
     firstPublishedDate: str = ""
     publishedDate: str = ""
 
+    fileLinks: list[str] = field(default_factory=list)
+
     cover: Optional[Document] = None
     type: str = "Book"