diff --git a/.gitignore b/.gitignore
index b5c50c7..bca00ce 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@ vendor
 report
 test.php
 composer.phar
+composer.lock
 phpunit.xml
 .idea/*
 .php_cs.cache
\ No newline at end of file
diff --git a/composer.json b/composer.json
index b60e33b..da0fddc 100755
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
     "psr-4": {"Porox\\Dropmefiles\\Tests\\": "tests/"}
   },
   "require": {
-    "php": ">=7.0",
+    "php": ">=7.2",
     "guzzlehttp/guzzle": "~6.3",
     "ext-json": "*"
   },
diff --git a/src/Client.php b/src/Client.php
index a4d6c93..55ab624 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -4,10 +4,19 @@
 
 use Porox\Dropmefiles\Client\Exception\DropmefilesException;
 
+/**
+ * Class Client.
+ */
 class Client implements DropmefilesClientInterface
 {
-    protected DropmefilesAPIInteface $api;
+    /**
+     * @var DropmefilesAPIInteface
+     */
+    protected $api;
 
+    /**
+     * Client constructor.
+     */
     public function __construct(DropmefilesAPIInteface $api)
     {
         $this->api = $api;
diff --git a/src/CreateFileConfig.php b/src/CreateFileConfig.php
index c502e0f..6deae4f 100644
--- a/src/CreateFileConfig.php
+++ b/src/CreateFileConfig.php
@@ -7,16 +7,16 @@
  */
 class CreateFileConfig
 {
-    protected bool $needPassword = false;
+    protected $needPassword = false;
 
     /**
      * @var \SplFileInfo []
      */
-    protected array $files = [];
+    protected $files = [];
 
-    protected int $size = 0;
+    protected $size = 0;
 
-    protected int $period = PeriodTypes::DAYS_3;
+    protected $period = PeriodTypes::DAYS_3;
 
     public function isNeedPassword(): bool
     {
diff --git a/src/DropmefilesAPI.php b/src/DropmefilesAPI.php
index beb9369..e3f949e 100644
--- a/src/DropmefilesAPI.php
+++ b/src/DropmefilesAPI.php
@@ -2,11 +2,11 @@
 
 namespace Porox\Dropmefiles\Client;
 
+use GuzzleHttp\ClientInterface;
+use GuzzleHttp\RequestOptions;
 use Porox\Dropmefiles\Client\Dto\DropmefilesDto;
 use Porox\Dropmefiles\Client\Dto\DropmefilesFileDto;
 use Porox\Dropmefiles\Client\Exception\DropmefilesException;
-use GuzzleHttp\ClientInterface;
-use GuzzleHttp\RequestOptions;
 
 /**
  * Class DropmefilesAPI.
@@ -17,7 +17,7 @@ class DropmefilesAPI implements DropmefilesAPIInteface
 
     const CHUNK_SIZE = 4194304;
 
-    protected ClientInterface $httpClient;
+    protected $httpClient;
 
     /**
      * DropmefilesAPI constructor.
diff --git a/src/Dto/DropmefilesDto.php b/src/Dto/DropmefilesDto.php
index 19b4593..2be7676 100644
--- a/src/Dto/DropmefilesDto.php
+++ b/src/Dto/DropmefilesDto.php
@@ -2,13 +2,25 @@
 
 namespace Porox\Dropmefiles\Client\Dto;
 
+/**
+ * Class DropmefilesDto.
+ */
 class DropmefilesDto
 {
-    protected string $uid;
+    /**
+     * @var string
+     */
+    protected $uid;
 
-    protected string $password;
+    /**
+     * @var string
+     */
+    protected $password;
 
-    protected array $files = [];
+    /**
+     * @var array
+     */
+    protected $files = [];
 
     public function getUid(): string
     {
diff --git a/src/Dto/DropmefilesFileDto.php b/src/Dto/DropmefilesFileDto.php
index c797c3b..6e50e89 100644
--- a/src/Dto/DropmefilesFileDto.php
+++ b/src/Dto/DropmefilesFileDto.php
@@ -2,26 +2,71 @@
 
 namespace Porox\Dropmefiles\Client\Dto;
 
+/**
+ * Class DropmefilesFileDto.
+ */
 class DropmefilesFileDto implements \JsonSerializable
 {
-    protected string $id;
-
-    protected string $name;
-
-    protected string $type = 'application\zip';
-
-    protected string  $relativePath = '';
-
-    protected int  $size;
-    protected int  $origSize;
-    protected int  $loaded;
-    protected int $percent = 100;
-    protected int $status = 5;
-    protected string  $lastModifiedDate = '2021-01-28T14:18:14.996Z';
-    protected int  $completeTimestamp;
-    protected string $dir;
-    protected int $logstatus = 2;
-
+    /**
+     * @var string
+     */
+    protected $id;
+
+    /**
+     * @var string
+     */
+    protected $name;
+
+    /**
+     * @var string
+     */
+    protected $type = 'application\zip';
+
+    /**
+     * @var string
+     */
+    protected $relativePath = '';
+
+    /**
+     * @var int
+     */
+    protected $size;
+    /**
+     * @var int
+     */
+    protected $origSize;
+    /**
+     * @var int
+     */
+    protected $loaded;
+    /**
+     * @var int
+     */
+    protected $percent = 100;
+    /**
+     * @var int
+     */
+    protected $status = 5;
+    /**
+     * @var string
+     */
+    protected $lastModifiedDate = '2021-01-28T14:18:14.996Z';
+    /**
+     * @var int
+     */
+    protected $completeTimestamp;
+    /**
+     * @var string
+     */
+    protected $dir;
+    /**
+     * @var int
+     */
+    protected $logstatus = 2;
+
+    /**
+     * DropmefilesFileDto constructor.
+     */
     public function __construct(string $id, string $name, int $size, string $dir)
     {
         $this->id = $id;
@@ -163,6 +208,9 @@ public function setLastModifiedDate(string $lastModifiedDate): void
         $this->lastModifiedDate = $lastModifiedDate;
     }
 
+    /**
+     * @return array|mixed
+     */
     public function jsonSerialize()
     {
         return get_object_vars($this);
diff --git a/src/Response.php b/src/Response.php
index a7f19f0..476fb72 100644
--- a/src/Response.php
+++ b/src/Response.php
@@ -7,15 +7,30 @@
  */
 class Response implements ResponseInterface
 {
-    protected bool $success = false;
-
-    protected string $url = '';
-
-    protected ?string $password = null;
-
-    protected string $errorText = '';
-
-    protected ?int $errorCode = null;
+    /**
+     * @var bool
+     */
+    protected $success = false;
+
+    /**
+     * @var string
+     */
+    protected $url = '';
+
+    /**
+     * @var string|null
+     */
+    protected $password = null;
+
+    /**
+     * @var string
+     */
+    protected $errorText = '';
+
+    /**
+     * @var int|null
+     */
+    protected $errorCode = null;
 
     public function getUrl(): string
     {