diff --git a/b0esche_cloud/lib/pages/public_file_viewer.dart b/b0esche_cloud/lib/pages/public_file_viewer.dart
index 612a68e..84f7b03 100644
--- a/b0esche_cloud/lib/pages/public_file_viewer.dart
+++ b/b0esche_cloud/lib/pages/public_file_viewer.dart
@@ -108,7 +108,10 @@ class _PublicFileViewerState extends State<PublicFileViewer> {
           final bytes = await apiClient.getBytes(path);
           final mimeType =
               _fileData?['capabilities']?['mimeType'] ?? 'video/mp4';
-          final blob = web.Blob([bytes], mimeType);
+          final blob = web.Blob(
+            [Uint8List.fromList(bytes)], // ignore: argument_type_not_assignable
+            web.BlobPropertyBag(type: mimeType),
+          );
           videoUrl = web.URL.createObjectURL(blob);
         } catch (e) {
           // Fallback to direct URL
diff --git a/b0esche_cloud/lib/widgets/web_audio_player.dart b/b0esche_cloud/lib/widgets/web_audio_player.dart
index 96e4fc1..90a7139 100644
--- a/b0esche_cloud/lib/widgets/web_audio_player.dart
+++ b/b0esche_cloud/lib/widgets/web_audio_player.dart
@@ -1,5 +1,6 @@
 import 'package:web/web.dart' as web;
 import 'dart:async';
+import 'dart:typed_data';
 import '../services/api_client.dart';
 import '../injection.dart';
 
@@ -52,7 +53,10 @@ class AudioPlayer {
       final apiClient = getIt<ApiClient>();
       final path = url.replaceFirst(apiClient.baseUrl, '');
       final bytes = await apiClient.getBytes(path);
-      final blob = web.Blob([bytes], mimeType ?? 'audio/mpeg');
+      final blob = web.Blob(
+        [Uint8List.fromList(bytes)], // ignore: argument_type_not_assignable
+        web.BlobPropertyBag(type: mimeType ?? 'audio/mpeg'),
+      );
       final blobUrl = web.URL.createObjectURL(blob);
 
       _audioElement = web.HTMLAudioElement();
@@ -128,7 +132,6 @@ class AudioPlayer {
       web.URL.revokeObjectURL(_blobUrl!);
       _blobUrl = null;
     }
-  }
     _audioElement = null;
     _positionController.close();
     _durationController.close();