diff --git a/lib/RetailCrm/Methods/V5/Customers.php b/lib/RetailCrm/Methods/V5/Customers.php
index daeb6d9..a9df396 100644
--- a/lib/RetailCrm/Methods/V5/Customers.php
+++ b/lib/RetailCrm/Methods/V5/Customers.php
@@ -141,4 +141,45 @@ trait Customers
             "POST"
         );
     }
+
+    /**
+     * Update subscriptions a customer
+     *
+     * @param array $subscriptions subscriptions data
+     * @param integer $customerId identifier customer
+     * @param string $by (default: 'externalId')
+     * @param string|null $site (default: null)
+     *
+     * @throws \InvalidArgumentException
+     * @throws \RetailCrm\Exception\InvalidJsonException
+     * @throws \RetailCrm\Exception\CurlException
+     *
+     * @return \RetailCrm\Response\ApiResponse
+     */
+    public function customerSubscriptionsUpdate(array $subscriptions, $customerId, $by = 'externalId', $site = null)
+    {
+        if (!count($subscriptions)) {
+            throw new \InvalidArgumentException(
+                'Parameter `subscriptions` must contains a data'
+            );
+        }
+
+        if ($customerId === null || $customerId === '') {
+            throw new \InvalidArgumentException(
+                'Parameter `customerId` is empty'
+            );
+        }
+
+        $this->checkIdParameter($by);
+
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            sprintf('/customers/%s/subscriptions', $customerId),
+            'POST',
+            $this->fillSite(
+                $site,
+                ['subscriptions' => json_encode($subscriptions), 'by' => $by]
+            )
+        );
+    }
 }
diff --git a/tests/RetailCrm/Tests/Methods/Version5/ApiClientCustomersTest.php b/tests/RetailCrm/Tests/Methods/Version5/ApiClientCustomersTest.php
index 5353d1e..29f3b3b 100644
--- a/tests/RetailCrm/Tests/Methods/Version5/ApiClientCustomersTest.php
+++ b/tests/RetailCrm/Tests/Methods/Version5/ApiClientCustomersTest.php
@@ -11,6 +11,7 @@
 
 namespace RetailCrm\Tests\Methods\Version5;
 
+use RetailCrm\Response\ApiResponse;
 use RetailCrm\Test\TestCase;
 
 /**
@@ -441,4 +442,45 @@ class ApiClientCustomersTest extends TestCase
         static::assertTrue($responseDelete->isSuccessful(), 'Note deleted');
         static::assertEquals(200, $responseDelete->getStatusCode());
     }
+
+    public function testCustomerSubscriptionsUpdate()
+    {
+        $clientMock = $this->getMockBuilder(\RetailCrm\Http\Client::class)
+            ->disableOriginalConstructor()
+            ->setMethods(['makeRequest'])
+            ->getMock()
+        ;
+
+        $parameters = [
+            'subscriptions' => [
+                [
+                    'channel' => 'email',
+                    'active' => false
+                ]
+            ],
+            'by' => 'externalId',
+            'site' => 'test'
+        ];
+
+        $clientMock->expects(self::once())->method('makeRequest')->with(
+            '/customers/123/subscriptions',
+            'POST',
+            [
+                'subscriptions' => json_encode($parameters['subscriptions']),
+                'by' => $parameters['by'],
+                'site' => $parameters['site']
+            ]
+        )->willReturn((new ApiResponse(200, json_encode(['success' => true])))->asJsonResponse());
+
+        $client = static::getMockedApiClient($clientMock);
+
+        $response = $client->request->customerSubscriptionsUpdate(
+            $parameters['subscriptions'],
+            123,
+            $parameters['by'],
+            $parameters['site']
+        );
+
+        static::assertTrue($response->isSuccessful());
+    }
 }