diff --git a/lib/dlc/script.dart b/lib/dlc/script.dart
index cd94a84..7e08df3 100644
--- a/lib/dlc/script.dart
+++ b/lib/dlc/script.dart
@@ -1,6 +1,6 @@
 import 'package:bitcoin_library/script.dart';
 
-void main() {
+void main(dynamic scriptMessage) {
   final privateKey = Uint8List.fromList([/* your private key bytes */]);
   final message = Uint8List.fromList([/* your message bytes */]);
   final signature = signMessage(privateKey, message);