diff --git a/readme.md b/readme.md
index 246b887..4291277 100644
--- a/readme.md
+++ b/readme.md
@@ -1,12 +1,14 @@
 # GPWebPay Core library
-[![Build Status](https://travis-ci.org/Pixidos/gpwebpay-core.svg?branch=master)](https://travis-ci.org/Pixidos/gpwebpay-core)
-[![Donwloads](https://poser.pugx.org/pixidos/gpwebpay-core/downloads)](https://packagist.org/packages/pixidos/gpwebpay-core)
-[![Latest stable](https://img.shields.io/packagist/v/pixidos/gpwebpay-core.svg)](https://packagist.org/packages/pixidos/gpwebpay-core)
 ![](https://img.shields.io/badge/PHPStan-enabled-brightgreen.svg?style=flat)
+[![Code Analyse Actions Status](https://github.com/Pixidos/gpwebpay-core/workflows/Code%20Analyse/badge.svg?branch=master)](https://github.com/Pixidos/gpwebpay-core/actions)
+[![UnitTests Actions Status](https://github.com/Pixidos/gpwebpay-core/workflows/Unit%20Tests/badge.svg?branch=master)](https://github.com/Pixidos/gpwebpay-core/actions)
 [![Code coverage](https://codecov.io/gh/Pixidos/gpwebpay-core/branch/master/graph/badge.svg)](https://codecov.io/gh/Pixidos/gpwebpay-core)
-[![Documentation Status](https://readthedocs.org/projects/gpwebpay-core/badge/?version=latest)](https://gpwebpay-core.readthedocs.io/en/latest/?badge=latest)
 [![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/Pixidos/gpwebpay-core/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/Pixidos/gpwebpay-core/?branch=master)
+[![Documentation Status](https://readthedocs.org/projects/gpwebpay-core/badge/?version=latest)](https://gpwebpay-core.readthedocs.io/en/latest/?badge=latest)
 
+[![Donwloads](https://poser.pugx.org/pixidos/gpwebpay-core/downloads)](https://packagist.org/packages/pixidos/gpwebpay-core)
+[![Latest stable](https://img.shields.io/packagist/v/pixidos/gpwebpay-core.svg)](https://packagist.org/packages/pixidos/gpwebpay-core)
+![](https://img.shields.io/badge/php-7.2%20to%208.0-777bb3.svg?logo=php&logoColor=white&labelColor=555555%22)
 
 GPWebPay Core is library for [GPWebPay service](http://www.gpwebpay.cz/ ) HTTP API
 
diff --git a/src/Factory/ResponseFactory.php b/src/Factory/ResponseFactory.php
index 2e25549..731e534 100644
--- a/src/Factory/ResponseFactory.php
+++ b/src/Factory/ResponseFactory.php
@@ -93,7 +93,7 @@ private function getStringValue(string $name, array &$params, string $defaultVal
             unset($params[$name]);
         }
 
-        return (string)$value;
+        return $value;
     }
 
     /**
diff --git a/src/Param/OrderNumber.php b/src/Param/OrderNumber.php
index 8bb3f45..8df275f 100644
--- a/src/Param/OrderNumber.php
+++ b/src/Param/OrderNumber.php
@@ -39,7 +39,7 @@ public function __construct($value)
     }
 
     /**
-     * @return mixed
+     * @return int|float|string
      */
     public function getValue()
     {
diff --git a/tests/ResponseProviderTest.php b/tests/ResponseProviderTest.php
index 6ea0e96..89f50fe 100644
--- a/tests/ResponseProviderTest.php
+++ b/tests/ResponseProviderTest.php
@@ -77,7 +77,7 @@ public function testOnError(): void
 
         $called = false;
         $provider->addOnError(
-            static function (GPWebPayException $exception, ResponseInterface $response) use (&$called) {
+            static function (GPWebPayException $exception, ResponseInterface $response) use (&$called): void {
                 $called = true;
             }
         );
@@ -93,7 +93,7 @@ public function testOnSuccess(): void
 
         $called = false;
         $provider->addOnSuccess(
-            static function (ResponseInterface $response) use (&$called) {
+            static function (ResponseInterface $response) use (&$called): void {
                 $called = true;
             }
         );
diff --git a/tests/Signer/Key/AbstractKeyTest.php b/tests/Signer/Key/AbstractKeyTest.php
index 212d15f..bed373a 100644
--- a/tests/Signer/Key/AbstractKeyTest.php
+++ b/tests/Signer/Key/AbstractKeyTest.php
@@ -27,11 +27,9 @@ public function testNotExistFileThrowException(): void
 
         new class ('misssing_file') extends AbstractKey {
 
-            /**
-             * @return resource|void
-             */
             protected function createKey()
             {
+                //@phpstan-ignore-next-line
                 return;
             }
         };
diff --git a/tests/Signer/Key/PublicKeyTest.php b/tests/Signer/Key/PublicKeyTest.php
index 1f1b873..036e530 100644
--- a/tests/Signer/Key/PublicKeyTest.php
+++ b/tests/Signer/Key/PublicKeyTest.php
@@ -47,7 +47,7 @@ public function testReadFileThrowException(): void
 
         $publicKey = $this->getMockBuilder(PublicKey::class)
             ->setConstructorArgs([$file])
-            ->setMethods(['getContent'])
+            ->onlyMethods(['getContent'])
             ->getMock();
         $publicKey->expects(self::once())->method('getContent')->willReturn('');