diff --git a/.travis.yml b/.travis.yml
index fc8203a47..e8be80ce5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,7 +13,7 @@ php:
 
 env:
   global:
-    - STRIPE_MOCK_VERSION=0.56.0
+    - STRIPE_MOCK_VERSION=0.57.0
   matrix:
     - AUTOLOAD=1
     - AUTOLOAD=0
diff --git a/init.php b/init.php
index 2f6ccfbf6..d476e32d2 100644
--- a/init.php
+++ b/init.php
@@ -104,6 +104,7 @@
 require(dirname(__FILE__) . '/lib/Person.php');
 require(dirname(__FILE__) . '/lib/Plan.php');
 require(dirname(__FILE__) . '/lib/Product.php');
+require(dirname(__FILE__) . '/lib/Radar/EarlyFraudWarning.php');
 require(dirname(__FILE__) . '/lib/Radar/ValueList.php');
 require(dirname(__FILE__) . '/lib/Radar/ValueListItem.php');
 require(dirname(__FILE__) . '/lib/Recipient.php');
diff --git a/lib/Radar/EarlyFraudWarning.php b/lib/Radar/EarlyFraudWarning.php
new file mode 100644
index 000000000..5131e52fc
--- /dev/null
+++ b/lib/Radar/EarlyFraudWarning.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace Stripe\Radar;
+
+/**
+ * Class EarlyFraudWarning
+ *
+ * @property string $id
+ * @property string $object
+ * @property bool $actionable
+ * @property string $charge
+ * @property int $created
+ * @property string $fraud_type
+ * @property bool $livemode
+ *
+ * @package Stripe\Radar
+ */
+class EarlyFraudWarning extends \Stripe\ApiResource
+{
+    const OBJECT_NAME = "radar.early_fraud_warning";
+
+    use \Stripe\ApiOperations\All;
+    use \Stripe\ApiOperations\Retrieve;
+
+    /**
+     * Possible string representations of an early fraud warning's fraud type.
+     * @link https://stripe.com/docs/api/early_fraud_warnings/object#early_fraud_warning_object-fraud_type
+     */
+    const FRAUD_TYPE_CARD_NEVER_RECEIVED         = 'card_never_received';
+    const FRAUD_TYPE_FRAUDULENT_CARD_APPLICATION = 'fraudulent_card_application';
+    const FRAUD_TYPE_MADE_WITH_COUNTERFEIT_CARD  = 'made_with_counterfeit_card';
+    const FRAUD_TYPE_MADE_WITH_LOST_CARD         = 'made_with_lost_card';
+    const FRAUD_TYPE_MADE_WITH_STOLEN_CARD       = 'made_with_stolen_card';
+    const FRAUD_TYPE_MISC                        = 'misc';
+    const FRAUD_TYPE_UNAUTHORIZED_USE_OF_CARD    = 'unauthorized_use_of_card';
+}
diff --git a/lib/Util/Util.php b/lib/Util/Util.php
index e21d45dac..24e742121 100644
--- a/lib/Util/Util.php
+++ b/lib/Util/Util.php
@@ -117,6 +117,7 @@ public static function convertToStripeObject($resp, $opts)
             \Stripe\Person::OBJECT_NAME => 'Stripe\\Person',
             \Stripe\Plan::OBJECT_NAME => 'Stripe\\Plan',
             \Stripe\Product::OBJECT_NAME => 'Stripe\\Product',
+            \Stripe\Radar\EarlyFraudWarning::OBJECT_NAME => 'Stripe\\Radar\\EarlyFraudWarning',
             \Stripe\Radar\ValueList::OBJECT_NAME => 'Stripe\\Radar\\ValueList',
             \Stripe\Radar\ValueListItem::OBJECT_NAME => 'Stripe\\Radar\\ValueListItem',
             \Stripe\Recipient::OBJECT_NAME => 'Stripe\\Recipient',
diff --git a/tests/Stripe/Radar/EarlyFraudWarningTest.php b/tests/Stripe/Radar/EarlyFraudWarningTest.php
new file mode 100644
index 000000000..3facf67a9
--- /dev/null
+++ b/tests/Stripe/Radar/EarlyFraudWarningTest.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace Stripe\Radar;
+
+class EarlyFraudWarningTest extends \Stripe\TestCase
+{
+    const TEST_RESOURCE_ID = 'issfr_123';
+
+    public function testIsListable()
+    {
+        $this->expectsRequest(
+            'get',
+            '/v1/radar/early_fraud_warnings'
+        );
+        $resources = EarlyFraudWarning::all();
+        $this->assertTrue(is_array($resources->data));
+        $this->assertInstanceOf("Stripe\\Radar\\EarlyFraudWarning", $resources->data[0]);
+    }
+
+    public function testIsRetrievable()
+    {
+        $this->expectsRequest(
+            'get',
+            '/v1/radar/early_fraud_warnings/' . self::TEST_RESOURCE_ID
+        );
+        $resource = EarlyFraudWarning::retrieve(self::TEST_RESOURCE_ID);
+        $this->assertInstanceOf("Stripe\\Radar\\EarlyFraudWarning", $resource);
+    }
+}
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 6a128ea43..a7efedc7f 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -2,7 +2,7 @@
 
 require_once(__DIR__ . '/StripeMock.php');
 
-define("MOCK_MINIMUM_VERSION", "0.56.0");
+define("MOCK_MINIMUM_VERSION", "0.57.0");
 
 if (\Stripe\StripeMock::start()) {
     register_shutdown_function('\Stripe\StripeMock::stop');