diff --git a/app.js b/app.js
index c28e9d9..38e8b78 100644
--- a/app.js
+++ b/app.js
@@ -187,6 +187,17 @@ if (typeof CreateObject === "undefined") {
     };
 }
 
+if (typeof UseObject === "undefined") {
+    var UseObject = function(progId, callback) {
+        var obj = CreateObject(progId);
+        try {
+            return callback(obj);
+        } finally {
+            obj = null;
+        }
+    }
+}
+
 /**
  * @FN {string} The name of the file.
  */
@@ -283,7 +294,9 @@ function require(pathname) {
             return filename;
         })({
             existsSync: function(filename) {
-                return CreateObject("Scripting.FileSystemObject").FileExists(filename);
+                return UseObject("Scripting.FileSystemObject", function(fso) {
+                    return fso.FileExists(filename);
+                });
             }
         }, {
             join: function() {