diff --git a/src/Kobo/Response/SyncResponse.php b/src/Kobo/Response/SyncResponse.php
index b6d22ccd..b6d7f35e 100644
--- a/src/Kobo/Response/SyncResponse.php
+++ b/src/Kobo/Response/SyncResponse.php
@@ -127,7 +127,7 @@ private function createReadingState(Book $book): array
             'PriorityTimestamp' => $this->syncToken->maxLastCreated($book->getCreated(), $this->syncToken->currentDate),
 
             'StatusInfo' => [
-                'LastModified' => $book->getLastInteraction($this->kobo->getUser())?->getUpdated(),
+                'LastModified' => $this->syncToken->maxLastModified($book->getLastInteraction($this->kobo->getUser())?->getUpdated(), $this->getLastBookmarkDate($book), $this->syncToken->currentDate),
                 'Status' => match ($this->isReadingFinished($book)) {
                     true => SyncResponse::READING_STATUS_FINISHED,
                     false => SyncResponse::READING_STATUS_IN_PROGRESS,
@@ -288,4 +288,9 @@ private function createBookmark(?BookmarkUser $bookMark): array
 
         return array_filter($values); // Remove null values
     }
+
+    private function getLastBookmarkDate(Book $book): ?\DateTimeInterface
+    {
+        return $this->kobo->getUser()->getBookmarkForBook($book)?->getUpdated();
+    }
 }