diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5d2343d0..40acc447 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -41,4 +41,4 @@ See [DocuSign Support Center](https://support.docusign.com/en/releasenotes/) for
 
 ## [2.0.0] - New shiny PHP client - 2017-12-05
 
-## [1.0.0] - Old legacy version - 2016-02-18
\ No newline at end of file
+## [1.0.0] - Old legacy version - 2016-02-18
diff --git a/src/Api/TrustServiceProvidersApi.php b/src/Api/TrustServiceProvidersApi.php
new file mode 100644
index 00000000..d6c70ca0
--- /dev/null
+++ b/src/Api/TrustServiceProvidersApi.php
@@ -0,0 +1,187 @@
+<?php
+/**
+ * TrustServiceProvidersApi
+ * PHP version 5
+ *
+ * @category Class
+ * @package  DocuSign\eSign
+ * @author   Swagger Codegen team
+ * @link     https://github.com/swagger-api/swagger-codegen
+ */
+
+/**
+ * DocuSign REST API
+ *
+ * The DocuSign REST API provides you with a powerful, convenient, and simple Web services API for interacting with DocuSign.
+ *
+ * OpenAPI spec version: v2
+ * Contact: devcenter@docusign.com
+ * Generated by: https://github.com/swagger-api/swagger-codegen.git
+ * Swagger Codegen version: 2.4.13-SNAPSHOT
+ */
+
+/**
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen
+ * Do not edit the class manually.
+ */
+
+namespace DocuSign\eSign\Api\TrustServiceProvidersApi;
+
+
+
+namespace DocuSign\eSign\Api;
+
+use \DocuSign\eSign\Client\ApiClient;
+use \DocuSign\eSign\Client\ApiException;
+use \DocuSign\eSign\Configuration;
+use \DocuSign\eSign\ObjectSerializer;
+
+/**
+ * TrustServiceProvidersApi Class Doc Comment
+ *
+ * @category Class
+ * @package  DocuSign\eSign
+ * @author   Swagger Codegen team
+ * @link     https://github.com/swagger-api/swagger-codegen
+ */
+class TrustServiceProvidersApi
+{
+    /**
+     * API Client
+     *
+     * @var \DocuSign\eSign\Client\ApiClient instance of the ApiClient
+     */
+    protected $apiClient;
+
+    /**
+     * Constructor
+     *
+     * @param \DocuSign\eSign\Client\ApiClient|null $apiClient The api client to use
+     */
+    public function __construct(\DocuSign\eSign\Client\ApiClient $apiClient = null)
+    {
+        if ($apiClient === null) {
+            $apiClient = new ApiClient();
+        }
+
+        $this->apiClient = $apiClient;
+    }
+
+    /**
+     * Get API client
+     *
+     * @return \DocuSign\eSign\Client\ApiClient get the API client
+     */
+    public function getApiClient()
+    {
+        return $this->apiClient;
+    }
+
+    /**
+     * Set the API client
+     *
+     * @param \DocuSign\eSign\Client\ApiClient $apiClient set the API client
+     *
+     * @return TrustServiceProvidersApi
+     */
+    public function setApiClient(\DocuSign\eSign\Client\ApiClient $apiClient)
+    {
+        $this->apiClient = $apiClient;
+        return $this;
+    }
+
+    /**
+     * Operation getSealProviders
+     *
+     * Returns Account available seals for specified account.
+     *
+    * @param string $account_id The external account number (int) or account ID Guid.
+     * @throws \DocuSign\eSign\Client\ApiException on non-2xx response
+     * @return \DocuSign\eSign\Model\AccountSeals
+     */
+    public function getSealProviders($account_id)
+    {
+        list($response) = $this->getSealProvidersWithHttpInfo($account_id);
+        return $response;
+    }
+
+    /**
+     * Operation getSealProvidersWithHttpInfo
+     *
+     * Returns Account available seals for specified account.
+     *
+    * @param string $account_id The external account number (int) or account ID Guid.
+     * @throws \DocuSign\eSign\Client\ApiException on non-2xx response
+     * @return array of \DocuSign\eSign\Model\AccountSeals, HTTP status code, HTTP response headers (array of strings)
+     */
+    public function getSealProvidersWithHttpInfo($account_id)
+    {
+        // verify the required parameter 'account_id' is set
+        if ($account_id === null) {
+            throw new \InvalidArgumentException('Missing the required parameter $account_id when calling getSealProviders');
+        }
+        // parse inputs
+        $resourcePath = "/v2/accounts/{accountId}/seals";
+        $httpBody = '';
+        $queryParams = [];
+        $headerParams = [];
+        $formParams = [];
+        $_header_accept = $this->apiClient->selectHeaderAccept(['application/json']);
+        if (!is_null($_header_accept)) {
+            $headerParams['Accept'] = $_header_accept;
+        }
+        $headerParams['Content-Type'] = $this->apiClient->selectHeaderContentType([]);
+
+
+        // path params
+        if ($account_id !== null) {
+            $resourcePath = str_replace(
+                "{" . "accountId" . "}",
+                $this->apiClient->getSerializer()->toPathValue($account_id),
+                $resourcePath
+            );
+        }
+        // default format to json
+        $resourcePath = str_replace("{format}", "json", $resourcePath);
+
+        
+        // for model (json/xml)
+        if (isset($_tempBody)) {
+            $httpBody = $_tempBody; // $_tempBody is the method argument, if present
+        } elseif (count($formParams) > 0) {
+            $httpBody = $formParams; // for HTTP post (form)
+        }
+        // this endpoint requires OAuth (access token)
+        if (strlen($this->apiClient->getConfig()->getAccessToken()) !== 0) {
+            $headerParams['Authorization'] = 'Bearer ' . $this->apiClient->getConfig()->getAccessToken();
+        }
+        // make the API Call
+        try {
+            list($response, $statusCode, $httpHeader) = $this->apiClient->callApi(
+                $resourcePath,
+                'GET',
+                $queryParams,
+                $httpBody,
+                $headerParams,
+                '\DocuSign\eSign\Model\AccountSeals',
+                '/v2/accounts/{accountId}/seals'
+            );
+
+            return [$this->apiClient->getSerializer()->deserialize($response, '\DocuSign\eSign\Model\AccountSeals', $httpHeader), $statusCode, $httpHeader];
+        } catch (ApiException $e) {
+            switch ($e->getCode()) {
+                case 200:
+                    $data = $this->apiClient->getSerializer()->deserialize($e->getResponseBody(), '\DocuSign\eSign\Model\AccountSeals', $e->getResponseHeaders());
+                    $e->setResponseObject($data);
+                    break;
+                case 400:
+                    $data = $this->apiClient->getSerializer()->deserialize($e->getResponseBody(), '\DocuSign\eSign\Model\ErrorDetails', $e->getResponseHeaders());
+                    $e->setResponseObject($data);
+                    break;
+            }
+
+            throw $e;
+        }
+    }
+}
diff --git a/src/ObjectSerializer.php b/src/ObjectSerializer.php
index 053e4d35..87967f82 100644
--- a/src/ObjectSerializer.php
+++ b/src/ObjectSerializer.php
@@ -282,8 +282,13 @@ public static function deserialize($data, $class, $httpHeaders = null)
             }
 
             $file = fopen($filename, 'w');
-            while ($chunk = $data->read(200)) {
-                fwrite($file, $chunk);
+            if(is_string($data)){
+                fwrite($file, $data);
+            }
+            else{
+                while ($chunk = $data->read(200)) {
+                    fwrite($file, $chunk);
+                } 
             }
             fclose($file);
 
diff --git a/test/UnitTests.php b/test/UnitTests.php
index 89beaaf5..b489f728 100644
--- a/test/UnitTests.php
+++ b/test/UnitTests.php
@@ -313,8 +313,8 @@ public function testListDocumentsAndDownload($testConfig)
 			foreach($docsList->getEnvelopeDocuments() as $document)
 			{
 				$this->assertNotEmpty($document->getDocumentId());
-				//$file = $envelopeApi->getDocument($testConfig->getAccountId(), $testConfig->getEnvelopeId(), $document->getDocumentId());
-				//$this->assertNotEmpty($file);
+				$file = $envelopeApi->getDocument($testConfig->getAccountId(), $document->getDocumentId(), $testConfig->getEnvelopeId());
+				$this->assertNotEmpty($file);
 			}
 		}