diff --git a/app.js b/app.js
index 38e8b78..ceee604 100644
--- a/app.js
+++ b/app.js
@@ -189,10 +189,17 @@ if (typeof CreateObject === "undefined") {
 
 if (typeof UseObject === "undefined") {
     var UseObject = function(progId, callback) {
+        var _dispose = function(obj) {
+            try {
+                obj.Close();
+            } catch (e) { /* ignore */ }
+        };
+        
         var obj = CreateObject(progId);
         try {
             return callback(obj);
         } finally {
+            _dispose(obj);
             obj = null;
         }
     }