diff --git a/src/Bluesnap/Adapter.php b/src/Bluesnap/Adapter.php
index 12468e7..5b959f7 100644
--- a/src/Bluesnap/Adapter.php
+++ b/src/Bluesnap/Adapter.php
@@ -99,7 +99,11 @@ public static function update($model, $id, $data, $options = [])
             $endpoint = Utility::getModelEndpoint($model, $id);
             $endpoint = $id_in_url ? $endpoint .'/'. $id : $endpoint;
 
-            $response = Api::put($endpoint, $data);
+            if($model == 'Refund') {
+                $response = Api::post($endpoint, $data);
+            } else {
+                $response = Api::put($endpoint, $data);
+            }
             $model = Utility::setupModel($model, $response);
 
             return new Response('success', $model);
diff --git a/src/Bluesnap/Refund.php b/src/Bluesnap/Refund.php
index f7b1c4a..a523449 100644
--- a/src/Bluesnap/Refund.php
+++ b/src/Bluesnap/Refund.php
@@ -9,7 +9,7 @@ class Refund
 {
     public static function update($id, $query_params = null)
     {
-        return Adapter::update('Refund', $id, null, [
+        return Adapter::update('Refund', $id, $query_params, [
             'id_in_url' => false,
             'query_params' => $query_params
         ]);
diff --git a/src/Bluesnap/Utility.php b/src/Bluesnap/Utility.php
index 0aebbd0..5aab2f3 100644
--- a/src/Bluesnap/Utility.php
+++ b/src/Bluesnap/Utility.php
@@ -41,7 +41,7 @@ public static function getModelEndpoint($model, $model_id = null)
         $models = [
             'CardTransaction' => 'transactions',
             'Report' => 'report',
-            'Refund' => 'transactions/'. $model_id .'/refund',
+            'Refund' => 'transactions/refund/'. $model_id,
             'Plan' => 'recurring/plans',
             'Subscription' => 'recurring/subscriptions',
             'SubscriptionCharge' => 'recurring/subscriptions/charges',