diff --git a/lib/restler.js b/lib/restler.js
index fda78fc..7b97a4d 100644
--- a/lib/restler.js
+++ b/lib/restler.js
@@ -46,10 +46,13 @@ function Request(uri, options) {
   if (!this.options.method) this.options.method = (this.options.data) ? 'POST' : 'GET';
   if (typeof this.options.followRedirects == 'undefined') this.options.followRedirects = true;
   
+  // set the querystring to the override if it is provided
+  if (!this.querystring) this.querystring = this.options.querystring ? this.options.querystring : qs;
+
   // stringify query given in options of not given in URL
   if (this.options.query && !this.url.query) {
     if (typeof this.options.query == 'object') 
-      this.url.query = qs.stringify(this.options.query);
+      this.url.query = this.querystring.stringify(this.options.query);
     else this.url.query = this.options.query;
   }
   
@@ -66,7 +69,7 @@ function Request(uri, options) {
     }
   } else {
     if (typeof this.options.data == 'object') {
-      this.options.data = qs.stringify(this.options.data);
+      this.options.data = this.querystring.stringify(this.options.data);
       this.headers['Content-Type'] = 'application/x-www-form-urlencoded';
       this.headers['Content-Length'] = this.options.data.length;
     }