diff --git a/analysis_options.yaml b/analysis_options.yaml
index 0affb20f..3cf0b93f 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -11,6 +11,7 @@ linter:
 analyzer:
   errors:
     todo: ignore
+    import_of_legacy_library_into_null_safe: ignore
   exclude:
     - example/main.dart
     # needed until crypto packages upgrade
diff --git a/lib/src/database/database_api.dart b/lib/src/database/database_api.dart
index fa7c2266..4d9ceabb 100644
--- a/lib/src/database/database_api.dart
+++ b/lib/src/database/database_api.dart
@@ -1,4 +1,3 @@
-// @dart=2.9
 /*
  *   Famedly Matrix SDK
  *   Copyright (C) 2021 Famedly GmbH
diff --git a/lib/src/utils/crypto/js.dart b/lib/src/utils/crypto/js.dart
index aeb72996..b889720a 100644
--- a/lib/src/utils/crypto/js.dart
+++ b/lib/src/utils/crypto/js.dart
@@ -3,9 +3,7 @@
 
 import 'dart:typed_data';
 
-// ignore: import_of_legacy_library_into_null_safe
 import 'subtle.dart';
-// ignore: import_of_legacy_library_into_null_safe
 import 'subtle.dart' as subtle;
 
 abstract class Hash {