diff --git a/lib/src/readers/book_cover_reader.dart b/lib/src/readers/book_cover_reader.dart
index 1f14e0eb..1eba1547 100644
--- a/lib/src/readers/book_cover_reader.dart
+++ b/lib/src/readers/book_cover_reader.dart
@@ -1,4 +1,5 @@
 import 'dart:async';
+import 'dart:typed_data';
 
 import 'package:collection/collection.dart' show IterableExtension;
 import 'package:image/image.dart' as images;
@@ -40,7 +41,7 @@ class BookCoverReader {
     coverImageContentFileRef = bookRef.Content!.Images![coverManifestItem.Href];
     var coverImageContent =
         await coverImageContentFileRef!.readContentAsBytes();
-    var retval = images.decodeImage(coverImageContent);
+    var retval = images.decodeImage(Uint8List.fromList(coverImageContent));
     return retval;
   }
 }