diff --git a/dart/bin/sleep.dart b/dart/bin/sleep.dart
index b4daad1..a84ef5e 100644
--- a/dart/bin/sleep.dart
+++ b/dart/bin/sleep.dart
@@ -2,15 +2,15 @@ import 'package:libac_dart/utils/IOTools.dart';
 
 Future<void> main(List<String> args) async {
   int seconds = int.parse(args[0]);
-  prnt("\rPlease Wait $seconds second(s)...");
+  await prnt("\rPlease Wait $seconds second(s)...");
 
   while(seconds>=0) {
 
     await Future.delayed(Duration(seconds: 1));
-    prnt("\rPlease Wait $seconds second(s)...");
+    await prnt("\rPlease Wait $seconds second(s)...");
 
     seconds--;
   }
 
-  prnt("\r\n");
+  await prnt("\r\n");
 }
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