diff --git a/oml/item/models.py b/oml/item/models.py
index 2032280..8420ecb 100644
--- a/oml/item/models.py
+++ b/oml/item/models.py
@@ -733,7 +733,7 @@ class File(db.Model):
         prefix = os.sep.join(os.path.join(os.path.expanduser(prefs['libraryPath']), 'Books/').split('/'))
         if not self.item:
             return
-        j = self.item.json()
+        j = self.item.json(keys=['title', 'author', 'publisher', 'date', 'extension'])
 
         current_path = self.fullpath()
         if not os.path.exists(current_path):