diff --git a/lib/bing.js b/lib/bing.js
index 40469da..0f697dc 100644
--- a/lib/bing.js
+++ b/lib/bing.js
@@ -75,7 +75,39 @@ var Bing = function (options) {
         ? "&Sources='" + encodeURIComponent(opts.sources) + "'"
         : '')
     + (opts.market ? "&mkt='" + opts.market + "'" : '')
-    + (opts.adult ? "&safesearch=" + opts.adult  : '')
+    + (opts.adult ? "&safesearch=" + opts.adult  : '');
+
+
+    var ignore = [
+        'spellcheck',
+        'top',
+        'offset',
+        'preContextText',
+        'mode',
+        'postContextText',
+        'sources',
+        'market',
+        'adult',
+        'accKey',
+        'reqTimeout',
+        'rootUri',
+        'skip',
+        'top',
+        'userAgent',
+        'videoFilters',
+        'videoSortBy'
+    ];
+
+    // clone object
+    var newOpts = JSON.parse(JSON.stringify(opts));
+
+    ignore.forEach(function(key) {
+      delete newOpts[key];
+    });
+
+    var qStr = require('querystring').stringify(newOpts);
+
+    reqUri += '&' + qStr;
 
     request({
       uri: reqUri,