diff --git a/CHANGELOG.md b/CHANGELOG.md
index 59839c8af4..a9f8cac788 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # CHANGELOG
 
+## 13.1.0 - 2017-09-24
+
+###
+
+* Added withdrawOffer to Inventory service.
+
 ## 13.0.3 - 2017-09-07
 
 ## Fixes
diff --git a/src/Inventory/Services/InventoryService.php b/src/Inventory/Services/InventoryService.php
index 916cda5965..9d9983571d 100644
--- a/src/Inventory/Services/InventoryService.php
+++ b/src/Inventory/Services/InventoryService.php
@@ -260,6 +260,17 @@ class InventoryService extends \DTS\eBaySDK\Inventory\Services\InventoryBaseServ
                 ]
             ]
         ],
+        'WithdrawOffer' => [
+            'method' => 'POST',
+            'resource' => 'offer/{offerId}/withdraw',
+            'responseClass' => '\DTS\eBaySDK\Inventory\Types\WithdrawOfferRestResponse',
+            'params' => [
+                'offerId' => [
+                    'valid' => ['string'],
+                    'required' => true
+                ]
+            ]
+        ],
         'UpdateOffer' => [
             'method' => 'PUT',
             'resource' => 'offer/{offerId}',
@@ -710,6 +721,24 @@ public function publishOfferAsync(\DTS\eBaySDK\Inventory\Types\PublishOfferRestR
         return $this->callOperationAsync('PublishOffer', $request);
     }
 
+    /**
+     * @param \DTS\eBaySDK\Inventory\Types\WithdrawOfferRestRequest $request
+     * @return \DTS\eBaySDK\Inventory\Types\WithdrawOfferRestResponse
+     */
+    public function withdrawOffer(\DTS\eBaySDK\Inventory\Types\WithdrawOfferRestRequest $request)
+    {
+        return $this->withdrawOfferAsync($request)->wait();
+    }
+
+    /**
+     * @param \DTS\eBaySDK\Inventory\Types\WithdrawOfferRestRequest $request
+     * @return \GuzzleHttp\Promise\PromiseInterface
+     */
+    public function withdrawOfferAsync(\DTS\eBaySDK\Inventory\Types\WithdrawOfferRestRequest $request)
+    {
+        return $this->callOperationAsync('WithdrawOffer', $request);
+    }
+
     /**
      * @param \DTS\eBaySDK\Inventory\Types\UpdateOfferRestRequest $request
      * @return \DTS\eBaySDK\Inventory\Types\UpdateOfferRestResponse
diff --git a/src/Inventory/Types/WithdrawOfferRestRequest.php b/src/Inventory/Types/WithdrawOfferRestRequest.php
new file mode 100644
index 0000000000..3df2ab41ee
--- /dev/null
+++ b/src/Inventory/Types/WithdrawOfferRestRequest.php
@@ -0,0 +1,46 @@
+<?php
+/**
+ * DO NOT EDIT THIS FILE!
+ *
+ * This file was automatically generated from external sources.
+ *
+ * Any manual change here will be lost the next time the SDK
+ * is updated. You've been warned!
+ */
+
+namespace DTS\eBaySDK\Inventory\Types;
+
+/**
+ *
+ * @property string $offerId
+ */
+class WithdrawOfferRestRequest extends \DTS\eBaySDK\Types\BaseType
+{
+    /**
+     * @var array Properties belonging to objects of this class.
+     */
+    private static $propertyTypes = [
+        'offerId' => [
+            'type' => 'string',
+            'repeatable' => false,
+            'attribute' => false,
+            'elementName' => 'offerId'
+        ]
+    ];
+
+    /**
+     * @param array $values Optional properties and values to assign to the object.
+     */
+    public function __construct(array $values = [])
+    {
+        list($parentValues, $childValues) = self::getParentValues(self::$propertyTypes, $values);
+
+        parent::__construct($parentValues);
+
+        if (!array_key_exists(__CLASS__, self::$properties)) {
+            self::$properties[__CLASS__] = array_merge(self::$properties[get_parent_class()], self::$propertyTypes);
+        }
+
+        $this->setValues(__CLASS__, $childValues);
+    }
+}
diff --git a/src/Inventory/Types/WithdrawOfferRestResponse.php b/src/Inventory/Types/WithdrawOfferRestResponse.php
new file mode 100644
index 0000000000..6dc9dccb7d
--- /dev/null
+++ b/src/Inventory/Types/WithdrawOfferRestResponse.php
@@ -0,0 +1,65 @@
+<?php
+/**
+ * DO NOT EDIT THIS FILE!
+ *
+ * This file was automatically generated from external sources.
+ *
+ * Any manual change here will be lost the next time the SDK
+ * is updated. You've been warned!
+ */
+
+namespace DTS\eBaySDK\Inventory\Types;
+
+use DTS\eBaySDK\StatusCodeTrait;
+use DTS\eBaySDK\HttpHeadersTrait;
+
+/**
+ *
+ * @property \DTS\eBaySDK\Inventory\Types\ErrorDetailV3[] $errors
+ * @property \DTS\eBaySDK\Inventory\Types\ErrorDetailV3[] $warnings
+ */
+class WithdrawOfferRestResponse extends \DTS\eBaySDK\Inventory\Types\WithdrawResponse
+{
+    use StatusCodeTrait;
+    use HttpHeadersTrait;
+
+    /**
+     * @var array Properties belonging to objects of this class.
+     */
+    private static $propertyTypes = [
+        'errors' => [
+            'type' => 'DTS\eBaySDK\Inventory\Types\ErrorDetailV3',
+            'repeatable' => true,
+            'attribute' => false,
+            'elementName' => 'errors'
+        ],
+        'warnings' => [
+            'type' => 'DTS\eBaySDK\Inventory\Types\ErrorDetailV3',
+            'repeatable' => true,
+            'attribute' => false,
+            'elementName' => 'warnings'
+        ]
+    ];
+
+    /**
+     * @param array $values Optional properties and values to assign to the object.
+     * @param int $statusCode Status code
+     * @param array $headers HTTP Response headers.
+     */
+    public function __construct(array $values = [], $statusCode = 200, array $headers = [])
+    {
+        list($parentValues, $childValues) = self::getParentValues(self::$propertyTypes, $values);
+
+        parent::__construct($parentValues);
+
+        if (!array_key_exists(__CLASS__, self::$properties)) {
+            self::$properties[__CLASS__] = array_merge(self::$properties[get_parent_class()], self::$propertyTypes);
+        }
+
+        $this->setValues(__CLASS__, $childValues);
+
+        $this->statusCode = (int)$statusCode;
+
+        $this->setHeaders($headers);
+    }
+}
diff --git a/src/Inventory/Types/WithdrawResponse.php b/src/Inventory/Types/WithdrawResponse.php
new file mode 100644
index 0000000000..15d6c28018
--- /dev/null
+++ b/src/Inventory/Types/WithdrawResponse.php
@@ -0,0 +1,46 @@
+<?php
+/**
+ * DO NOT EDIT THIS FILE!
+ *
+ * This file was automatically generated from external sources.
+ *
+ * Any manual change here will be lost the next time the SDK
+ * is updated. You've been warned!
+ */
+
+namespace DTS\eBaySDK\Inventory\Types;
+
+/**
+ *
+ * @property string $listingId
+ */
+class WithdrawResponse extends \DTS\eBaySDK\Types\BaseType
+{
+    /**
+     * @var array Properties belonging to objects of this class.
+     */
+    private static $propertyTypes = [
+        'listingId' => [
+            'type' => 'string',
+            'repeatable' => false,
+            'attribute' => false,
+            'elementName' => 'listingId'
+        ]
+    ];
+
+    /**
+     * @param array $values Optional properties and values to assign to the object.
+     */
+    public function __construct(array $values = [])
+    {
+        list($parentValues, $childValues) = self::getParentValues(self::$propertyTypes, $values);
+
+        parent::__construct($parentValues);
+
+        if (!array_key_exists(__CLASS__, self::$properties)) {
+            self::$properties[__CLASS__] = array_merge(self::$properties[get_parent_class()], self::$propertyTypes);
+        }
+
+        $this->setValues(__CLASS__, $childValues);
+    }
+}
diff --git a/src/Sdk.php b/src/Sdk.php
index 01a3d47b36..51aa35418d 100644
--- a/src/Sdk.php
+++ b/src/Sdk.php
@@ -30,7 +30,7 @@
  */
 class Sdk
 {
-    const VERSION = '13.0.3';
+    const VERSION = '13.1.0';
 
     /**
      * @var bool Controls if the SDK should enforce strict types
diff --git a/test/Inventory/Types/WithdrawOfferRestRequestTest.php b/test/Inventory/Types/WithdrawOfferRestRequestTest.php
new file mode 100644
index 0000000000..ff3815a85a
--- /dev/null
+++ b/test/Inventory/Types/WithdrawOfferRestRequestTest.php
@@ -0,0 +1,33 @@
+<?php
+/**
+ * DO NOT EDIT THIS FILE!
+ *
+ * This file was automatically generated from external sources.
+ *
+ * Any manual change here will be lost the next time the SDK
+ * is updated. You've been warned!
+ */
+
+namespace DTS\eBaySDK\Test\Inventory\Types;
+
+use DTS\eBaySDK\Inventory\Types\WithdrawOfferRestRequest;
+
+class WithdrawOfferRestRequestTest extends \PHPUnit_Framework_TestCase
+{
+    private $obj;
+
+    protected function setUp()
+    {
+        $this->obj = new WithdrawOfferRestRequest();
+    }
+
+    public function testCanBeCreated()
+    {
+        $this->assertInstanceOf('\DTS\eBaySDK\Inventory\Types\WithdrawOfferRestRequest', $this->obj);
+    }
+
+    public function testExtendsBaseType()
+    {
+        $this->assertInstanceOf('\DTS\eBaySDK\Types\BaseType', $this->obj);
+    }
+}
diff --git a/test/Inventory/Types/WithdrawOfferRestResponseTest.php b/test/Inventory/Types/WithdrawOfferRestResponseTest.php
new file mode 100644
index 0000000000..1ae89901a0
--- /dev/null
+++ b/test/Inventory/Types/WithdrawOfferRestResponseTest.php
@@ -0,0 +1,33 @@
+<?php
+/**
+ * DO NOT EDIT THIS FILE!
+ *
+ * This file was automatically generated from external sources.
+ *
+ * Any manual change here will be lost the next time the SDK
+ * is updated. You've been warned!
+ */
+
+namespace DTS\eBaySDK\Test\Inventory\Types;
+
+use DTS\eBaySDK\Inventory\Types\WithdrawOfferRestResponse;
+
+class WithdrawOfferRestResponseTest extends \PHPUnit_Framework_TestCase
+{
+    private $obj;
+
+    protected function setUp()
+    {
+        $this->obj = new WithdrawOfferRestResponse();
+    }
+
+    public function testCanBeCreated()
+    {
+        $this->assertInstanceOf('\DTS\eBaySDK\Inventory\Types\WithdrawOfferRestResponse', $this->obj);
+    }
+
+    public function testExtendsWithdrawResponse()
+    {
+        $this->assertInstanceOf('\DTS\eBaySDK\Inventory\Types\WithdrawResponse', $this->obj);
+    }
+}
diff --git a/test/Inventory/Types/WithdrawResponseTest.php b/test/Inventory/Types/WithdrawResponseTest.php
new file mode 100644
index 0000000000..a94d0bb900
--- /dev/null
+++ b/test/Inventory/Types/WithdrawResponseTest.php
@@ -0,0 +1,33 @@
+<?php
+/**
+ * DO NOT EDIT THIS FILE!
+ *
+ * This file was automatically generated from external sources.
+ *
+ * Any manual change here will be lost the next time the SDK
+ * is updated. You've been warned!
+ */
+
+namespace DTS\eBaySDK\Test\Inventory\Types;
+
+use DTS\eBaySDK\Inventory\Types\WithdrawResponse;
+
+class WithdrawResponseTest extends \PHPUnit_Framework_TestCase
+{
+    private $obj;
+
+    protected function setUp()
+    {
+        $this->obj = new WithdrawResponse();
+    }
+
+    public function testCanBeCreated()
+    {
+        $this->assertInstanceOf('\DTS\eBaySDK\Inventory\Types\WithdrawResponse', $this->obj);
+    }
+
+    public function testExtendsBaseType()
+    {
+        $this->assertInstanceOf('\DTS\eBaySDK\Types\BaseType', $this->obj);
+    }
+}