diff --git a/lib/src/utils/receipt.dart b/lib/src/utils/receipt.dart
index aab82f0b..60bc4711 100644
--- a/lib/src/utils/receipt.dart
+++ b/lib/src/utils/receipt.dart
@@ -1,4 +1,3 @@
-// @dart=2.9
 /*
  *   Famedly Matrix SDK
  *   Copyright (C) 2020, 2021 Famedly GmbH