diff --git a/lib/network/images.dart b/lib/network/images.dart
index 74749ac..8255e97 100644
--- a/lib/network/images.dart
+++ b/lib/network/images.dart
@@ -71,7 +71,8 @@ abstract class ImageDownloader {
     }
 
     if (configs['onResponse'] is JSInvokable) {
-      buffer = (configs['onResponse'] as JSInvokable)([buffer]);
+      final uint8List = Uint8List.fromList(buffer);
+      buffer = (configs['onResponse'] as JSInvokable)([uint8List]);
       (configs['onResponse'] as JSInvokable).free();
     }