diff --git a/.travis.yml b/.travis.yml
index 9e19205..d685e83 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,15 @@
 language: php
 
 php:
-    - 7.1
     - 7.2
     - 7.3
 
+env:
+    - JMS=0.12
+    - JMS=1.0
+    - JMS=2.0
+    - JMS=3.0
+
 before_install:
     - composer selfupdate
-    - composer install --dev --no-interaction --prefer-dist
+    - composer require jms/serializer=^$JMS --no-interaction --prefer-dist
diff --git a/composer.json b/composer.json
index 77f32eb..0e2402f 100644
--- a/composer.json
+++ b/composer.json
@@ -10,17 +10,17 @@
         }
     ],
     "require": {
-        "php": ">=7.1",
+        "php": ">=7.2",
         "ext-curl": "*",
         "ext-json": "*",
         "guzzlehttp/guzzle": "~6.3",
-        "jms/serializer": "~0.12 || ~1.4.2",
+        "jms/serializer": "~0.12|~1.0|~2.0|~3.0",
         "symfony/validator": "~2.8|~3.0|~4.0",
         "doctrine/cache": "~1.6",
         "psr/log": "~1.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "~7.0"
+        "phpunit/phpunit": "~8.0"
     },
     "support": {
         "email": "support@retailcrm.ru"
diff --git a/tests/AtolOnlineClient/AtolOnlineTest.php b/tests/AtolOnlineClient/AtolOnlineTest.php
index 0199f30..b9f58f7 100644
--- a/tests/AtolOnlineClient/AtolOnlineTest.php
+++ b/tests/AtolOnlineClient/AtolOnlineTest.php
@@ -160,7 +160,7 @@ class AtolOnlineTest extends TestCase
         $request->setTimestamp('17.07.2019 10:14:22');
 
         $this->assertEquals(
-            '{"external_id":"test","receipt":{"client":{"email":"test@test.local"},"company":{"email":"test@test.local","inn":"11111111","payment_address":"address"},"items":[{"name":"test item","price":100,"quantity":1,"sum":100,"measurement_unit":"kg","payment_method":"advance","payment_object":"agent_commission","vat":{"type":"vat20","sum":20},"nomenclature_code":"00"}],"payments":[{"type":0,"sum":100}],"vats":[{"type":"vat20","sum":20}],"total":100},"timestamp":"17.07.2019 10:14:22","service":{"callback_url":"test.local"}}',
+            '{"external_id":"test","receipt":{"client":{"email":"test@test.local"},"company":{"email":"test@test.local","inn":"11111111","payment_address":"address"},"items":[{"name":"test item","price":100.1,"quantity":1,"sum":100.1,"measurement_unit":"kg","payment_method":"advance","payment_object":"agent_commission","vat":{"type":"vat20","sum":20.2},"nomenclature_code":"00"}],"payments":[{"type":0,"sum":100.1}],"vats":[{"type":"vat20","sum":20.2}],"total":100.1},"timestamp":"17.07.2019 10:14:22","service":{"callback_url":"test.local"}}',
             $this->atol->serializeOperationRequest($request)
         );
     }
diff --git a/tests/AtolOnlineClient/Traits/PaymentReceiptRequestTrait.php b/tests/AtolOnlineClient/Traits/PaymentReceiptRequestTrait.php
index e3d48fc..5933dce 100644
--- a/tests/AtolOnlineClient/Traits/PaymentReceiptRequestTrait.php
+++ b/tests/AtolOnlineClient/Traits/PaymentReceiptRequestTrait.php
@@ -30,22 +30,22 @@ trait PaymentReceiptRequestTrait
 
         $item = new ReceiptItemRequest();
         $item->setName('test item');
-        $item->setPrice(100);
+        $item->setPrice(100.1);
         $item->setQuantity(1);
-        $item->setSum(100);
+        $item->setSum(100.1);
         $item->setMeasurementUnit('kg');
         $item->setPaymentMethod(ReceiptItemRequest::PAYMENT_METHOD_ADVANCE);
         $item->setPaymentObject(ReceiptItemRequest::PAYMENT_OBJECT_AGENT_COMMISSION);
-        $item->setVat(new VatReceiptRequest('vat20', 20));
+        $item->setVat(new VatReceiptRequest('vat20', 20.2));
         $item->setNomenclatureCode('00');
 
         $receipt = new ReceiptRequest();
-        $receipt->setTotal('100');
+        $receipt->setTotal(100.1);
         $receipt->setClient($client);
         $receipt->setCompany($company);
         $receipt->setItems([$item]);
-        $receipt->setPayments([new ReceiptPaymentRequest(0, 100)]);
-        $receipt->setVats([new VatReceiptRequest('vat20', 20)]);
+        $receipt->setPayments([new ReceiptPaymentRequest(0, 100.1)]);
+        $receipt->setVats([new VatReceiptRequest('vat20', 20.2)]);
 
         /** @var PaymentReceiptRequest $request */
         $request = new PaymentReceiptRequest();