diff --git a/filcnaplo/lib/helpers/attachment_helper.dart b/filcnaplo/lib/helpers/attachment_helper.dart
index 76edc29..2500fca 100644
--- a/filcnaplo/lib/helpers/attachment_helper.dart
+++ b/filcnaplo/lib/helpers/attachment_helper.dart
@@ -1,9 +1,11 @@
 import 'dart:io';
 import 'dart:typed_data';
 
+import 'package:filcnaplo/api/providers/user_provider.dart';
 import 'package:filcnaplo/helpers/storage_helper.dart';
 import 'package:filcnaplo_kreta_api/client/client.dart';
 import 'package:filcnaplo_kreta_api/models/attachment.dart';
+import 'package:filcnaplo_kreta_api/models/homework.dart';
 import 'package:flutter/widgets.dart';
 import 'package:open_file/open_file.dart';
 import 'package:provider/provider.dart';
@@ -22,7 +24,29 @@ extension AttachmentHelper on Attachment {
 
   Future<bool> open(BuildContext context) async {
     String downloads = await StorageHelper.downloadsPath();
-    
+
+    if (!await File("$downloads/$name").exists()) await download(context);
+    var result = await OpenFile.open("$downloads/$name");
+    return result.type == ResultType.done;
+  }
+}
+
+extension HomeworkAttachmentHelper on HomeworkAttachment {
+  Future<String> download(BuildContext context, {bool overwrite = false}) async {
+    String downloads = await StorageHelper.downloadsPath();
+
+    if (!overwrite && await File("$downloads/$name").exists()) return "$downloads/$name";
+
+    String url = downloadUrl(Provider.of<UserProvider>(context, listen: false).instituteCode ?? "");
+    Uint8List data = await Provider.of<KretaClient>(context, listen: false).getAPI(url, rawResponse: true);
+    if (!await StorageHelper.write("$downloads/$name", data)) return "";
+
+    return "$downloads/$name";
+  }
+
+  Future<bool> open(BuildContext context) async {
+    String downloads = await StorageHelper.downloadsPath();
+
     if (!await File("$downloads/$name").exists()) await download(context);
     var result = await OpenFile.open("$downloads/$name");
     return result.type == ResultType.done;
diff --git a/filcnaplo_kreta_api b/filcnaplo_kreta_api
index 8d3c15f..bab39c9 160000
--- a/filcnaplo_kreta_api
+++ b/filcnaplo_kreta_api
@@ -1 +1 @@
-Subproject commit 8d3c15fc2a152dab0e9c58cfa65814f67179a676
+Subproject commit bab39c9eb4160b4140b63b6a95b8679b441aabee
diff --git a/filcnaplo_mobile_ui b/filcnaplo_mobile_ui
index 1fee7db..39bab27 160000
--- a/filcnaplo_mobile_ui
+++ b/filcnaplo_mobile_ui
@@ -1 +1 @@
-Subproject commit 1fee7db73a7048c6791acada571c449582d893b9
+Subproject commit 39bab27fd3624f2a790fb1576107a10c541a3db8