diff --git a/VERSION b/VERSION
index 9c6d629..bd8bf88 100755
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.6.1
+1.7.0
diff --git a/init.php b/init.php
index 7e6e918..cb6b67a 100755
--- a/init.php
+++ b/init.php
@@ -48,5 +48,6 @@
 require(dirname(__FILE__) . '/lib/Tenant.php');
 require(dirname(__FILE__) . '/lib/TenantTransfer.php');
 require(dirname(__FILE__) . '/lib/Term.php');
+require(dirname(__FILE__) . '/lib/ThreeDSecureRequest.php');
 require(dirname(__FILE__) . '/lib/Token.php');
 require(dirname(__FILE__) . '/lib/Transfer.php');
diff --git a/lib/ThreeDSecureRequest.php b/lib/ThreeDSecureRequest.php
new file mode 100644
index 0000000..ced538e
--- /dev/null
+++ b/lib/ThreeDSecureRequest.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace Payjp;
+
+class ThreeDSecureRequest extends ApiResource
+{
+    public static function className()
+    {
+        return 'three_d_secure_request';
+    }
+
+    /**
+     * @param string $id The ID of the three d secure request to retrieve.
+     * @param array|string|null $opts
+     *
+     * @return ThreeDSecureRequest
+     */
+    public static function retrieve($id, $opts = null)
+    {
+        return self::_retrieve($id, $opts);
+    }
+
+    /**
+     * @param array|null $params
+     * @param array|string|null $opts
+     *
+     * @return array An array of ThreeDSecureRequests.
+     */
+    public static function all($params = null, $opts = null)
+    {
+        return self::_all($params, $opts);
+    }
+
+    /**
+     * @param array|null $params
+     * @param array|string|null $opts
+     *
+     * @return ThreeDSecureRequest The created three d secure request.
+     */
+    public static function create($params = null, $opts = null)
+    {
+        return self::_create($params, $opts);
+    }
+}
diff --git a/lib/Util/Util.php b/lib/Util/Util.php
index b20b96f..7d119ef 100644
--- a/lib/Util/Util.php
+++ b/lib/Util/Util.php
@@ -24,6 +24,7 @@ abstract class Util
         'tenant_transfer' => \Payjp\TenantTransfer::class,
         'term' => \Payjp\Term::class,
         'transfer' => \Payjp\Transfer::class,
+        'three_d_secure_request' => \Payjp\ThreeDSecureRequest::class,
     );
 
     /**
diff --git a/tests/ThreeDSecureRequestTest.php b/tests/ThreeDSecureRequestTest.php
new file mode 100644
index 0000000..27efc5b
--- /dev/null
+++ b/tests/ThreeDSecureRequestTest.php
@@ -0,0 +1,82 @@
+<?php
+
+namespace Payjp;
+
+class ThreeDSecureRequestTest extends TestCase
+{
+
+    private function managedThreeDSecureRequestResource($id)
+    {
+        return [
+            'created' => 1730084767,
+            'expired_at' => null,
+            'finished_at' => null,
+            'id' => $id,
+            'livemode' => true,
+            'object' => 'three_d_secure_request',
+            'resource_id' => 'car_xxxxxxxxxxxxxxxxxxxxxxxxxxxx',
+            'result_received_at' => null,
+            'started_at' => null,
+            'state' => 'created',
+            'tenant_id' => null,
+            'three_d_secure_status' => 'unverified'
+        ];
+    }
+
+    private function managedThreeDSecureRequestResources($ids)
+    {
+        return [
+            'count' => count($ids),
+            'data' => array_map(function ($id) {
+                return $this->managedThreeDSecureRequestResource($id);
+            }, $ids),
+            'has_more' => false,
+            'object' => 'list',
+            'url' => '/v1/three_d_secure_requests'
+        ];
+    }
+
+    public function testRetrieve()
+    {
+        $expectedThreeDSecureRequestId = 'tdsr_125192559c91c4011c1ff56f50a';
+        $expectedThreeDSecureRequestResource = $this->managedThreeDSecureRequestResource($expectedThreeDSecureRequestId);
+        $this->mockRequest('GET', '/v1/three_d_secure_requests/' . $expectedThreeDSecureRequestId, [], $expectedThreeDSecureRequestResource);
+        $threeDSecureRequest = ThreeDSecureRequest::retrieve($expectedThreeDSecureRequestId);
+        $this->assertSame($expectedThreeDSecureRequestResource['created'], $threeDSecureRequest->created);
+        $this->assertSame($expectedThreeDSecureRequestResource['expired_at'], $threeDSecureRequest->expired_at);
+        $this->assertSame($expectedThreeDSecureRequestResource['finished_at'], $threeDSecureRequest->finished_at);
+        $this->assertSame($expectedThreeDSecureRequestResource['id'], $threeDSecureRequest->id);
+        $this->assertSame($expectedThreeDSecureRequestResource['livemode'], $threeDSecureRequest->livemode);
+        $this->assertSame($expectedThreeDSecureRequestResource['object'], $threeDSecureRequest->object);
+        $this->assertSame($expectedThreeDSecureRequestResource['resource_id'], $threeDSecureRequest->resource_id);
+        $this->assertSame($expectedThreeDSecureRequestResource['result_received_at'], $threeDSecureRequest->result_received_at);
+        $this->assertSame($expectedThreeDSecureRequestResource['started_at'], $threeDSecureRequest->started_at);
+        $this->assertSame($expectedThreeDSecureRequestResource['state'], $threeDSecureRequest->state);
+        $this->assertSame($expectedThreeDSecureRequestResource['tenant_id'], $threeDSecureRequest->tenant_id);
+        $this->assertSame($expectedThreeDSecureRequestResource['three_d_secure_status'], $threeDSecureRequest->three_d_secure_status);
+    }
+
+    public function testAll()
+    {
+        $expectedThreeDSecureRequestIds = array('tdsr_125192559c91c4011c1ff56f50a', 'tdsr_125192559c91c4011c1ff56f50b');
+        $this->mockRequest('GET', '/v1/three_d_secure_requests', array(), $this->managedThreeDSecureRequestResources($expectedThreeDSecureRequestIds));
+        $threeDSecureRequests = ThreeDSecureRequest::all();
+        $this->assertSame(count($expectedThreeDSecureRequestIds), $threeDSecureRequests['count']);
+        $this->assertCount(count($expectedThreeDSecureRequestIds), $threeDSecureRequests['data']);
+        $this->assertSame($expectedThreeDSecureRequestIds[0], $threeDSecureRequests['data'][0]->id);
+        $this->assertSame($expectedThreeDSecureRequestIds[1], $threeDSecureRequests['data'][1]->id);
+    }
+
+    public function testCreate()
+    {
+        $expectedThreeDSecureRequestId = 'tdsr_125192559c91c4011c1ff56f50a';
+        $expectedCustomerCardId = 'car_xxxxxxxxxxxxxxxxxxxxxxxxxxxx';
+        $params = [
+            'resource_id' => $expectedCustomerCardId
+        ];
+        $this->mockRequest('POST', '/v1/three_d_secure_requests', $params, $this->managedThreeDSecureRequestResource($expectedThreeDSecureRequestId));
+        $threeDSecureRequest = ThreeDSecureRequest::create($params);
+        $this->assertSame($expectedThreeDSecureRequestId, $threeDSecureRequest->id);
+        $this->assertSame($expectedCustomerCardId, $threeDSecureRequest->resource_id);
+    }
+}