diff --git a/src/Etsy/EtsyApi.php b/src/Etsy/EtsyApi.php
index 06b8fa7..f0af086 100644
--- a/src/Etsy/EtsyApi.php
+++ b/src/Etsy/EtsyApi.php
@@ -110,7 +110,23 @@ private function prepareData($data) {
 
 	private function prepareParameters($params) {
 		$query_pairs = array();
-		$allowed = array("limit", "offset", "page", "sort_on", "sort_order", "include_private", "language");
+		$allowed = array(
+		"limit", 
+		"offset", 
+		"page", 
+		"sort_on", 
+		"sort_order", 
+		"include_private", 
+		"language",
+		"include_private",
+        "language",
+        "min_created",
+        "max_created",
+        "max_last_modified",
+        "min_last_modified",
+        "was_paid",
+        "was_shipped"
+		);
 
 		if ($params) {
 			foreach($params as $key=>$value) {