diff --git a/src/Etsy/OAuthHelper.php b/src/Etsy/OAuthHelper.php
index cbbc51c..0de5a41 100644
--- a/src/Etsy/OAuthHelper.php
+++ b/src/Etsy/OAuthHelper.php
@@ -22,12 +22,20 @@ public function requestPermissionUrl(array $extra = array())
         return $this->request_token['login_url'];
     }
 
-    public function getAccessToken($verifier)
+    public function getAccessToken($verifier, $oauth_token = false, $oauth_token_secret = false)
     {
-        $this->client->authorize($this->request_token['oauth_token'], $this->request_token['oauth_token_secret']);
-
+        if (!$oauth_token) {
+            $oauth_token = $this->request_token['oauth_token'];
+        } else {
+            $this->request_token['oauth_token'] = $oauth_token;
+        }
+        if (!$oauth_token_secret) {
+            $oauth_token_secret = $this->request_token['oauth_token_secret'];
+        } else {
+            $this->request_token['oauth_token_secret'] = $oauth_token_secret;
+        }
+        $this->client->authorize($oauth_token, $oauth_token_secret);
         $this->access_token = $this->client->getAccessToken($verifier);
-
         return $this->getAuth();
     }
 
diff --git a/src/Etsy/methods.json b/src/Etsy/methods.json
index f4248da..3b58983 100644
--- a/src/Etsy/methods.json
+++ b/src/Etsy/methods.json
@@ -2605,8 +2605,8 @@
     "uri": "/shops/:shop_id/receipts",
     "params": {
       "shop_id": "shop_id_or_name",
-      "min_created": "epoch",
-      "max_created": "epoch",
+      "min_created": "int",
+      "max_created": "int",
       "min_last_modified": "int",
       "max_last_modified": "int",
       "limit": "int",