diff --git a/htmltidy.js b/htmltidy.js
old mode 100644
new mode 100755
index 6e501da..d45fa1e
--- a/htmltidy.js
+++ b/htmltidy.js
@@ -127,7 +127,7 @@ function tidy(text, opts, cb) {
     error+= data;
   });
   worker.on('end', function (code) {
-    cb(error, result);
+    setImmediate(function(){cb(error, result);});
   });
   worker.end(text);
 }