diff --git a/.gitignore b/.gitignore
index 723ef36..9e5d3c3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
-.idea
\ No newline at end of file
+.idea
+/vendor
diff --git a/app/code/Scenario.php b/app/code/Scenario.php
index b6095a4..010b681 100644
--- a/app/code/Scenario.php
+++ b/app/code/Scenario.php
@@ -9,7 +9,6 @@ use Shikiryu\Backup\Transport\Factory as TransportFactory;
 
 class Scenario
 {
-
     /* @var $backup BackupAbstract */
     private $backup;
     /* @var $to TransportAbstract */
@@ -18,19 +17,8 @@ class Scenario
     public static function register()
     {
         include __DIR__.'/../../vendor/autoload.php';
-        //spl_autoload_register(array(__CLASS__, 'autoload'));
     }
 
-    /*public static function autoload($class)
-    {
-        if (strpos($class, __NAMESPACE__.'\\') === 0)
-        {
-            $relative_NS     = str_replace(__NAMESPACE__, '', $class);
-            $translated_path = str_replace('\\', '/', $relative_NS);
-            require __DIR__ . '/' . $translated_path . '.php';
-        }
-    }*/
-
     /**
      * @param array $scenario
      */
@@ -70,8 +58,6 @@ class Scenario
         // add autoloader
         static::register();
 
-        $scenario = __DIR__.'/../scenario/'.$scenario;
-
         // check the given scenario
         if (is_readable($scenario)) {
             $scenario = json_decode(file_get_contents($scenario), true);
diff --git a/app/code/Transport/Dropbox.php b/app/code/Transport/Dropbox.php
index 05ed9e5..464e356 100644
--- a/app/code/Transport/Dropbox.php
+++ b/app/code/Transport/Dropbox.php
@@ -2,8 +2,7 @@
 
 namespace Shikiryu\Backup\Transport;
 
-use Dropbox\Client;
-use Shikiryu\Backup\Transport\TransportAbstract;
+use Spatie\Dropbox\Client;
 
 class Dropbox extends TransportAbstract
 {
@@ -15,13 +14,13 @@ class Dropbox extends TransportAbstract
     private $dropbox;
 
     protected $token    = '';
-    protected $app      = '';
+//    protected $app      = '';
     protected $folder   = '';
 
     public function __construct($backup, $config)
     {
         parent::__construct($backup, $config);
-        $this->dropbox = new Client($this->token, $this->app);
+        $this->dropbox = new Client($this->token);
     }
 
     /**
@@ -33,7 +32,7 @@ class Dropbox extends TransportAbstract
         $files = $this->backup->getFilesToBackup();
         foreach ($files as $file => $name) {
             $file = fopen($file, 'rb');
-            $upload = $this->dropbox->uploadFile($this->folder.'/'.$name, \Dropbox\WriteMode::force(), $file);
+            $upload = $this->dropbox->upload($this->folder.'/'.$name, $file);
             if (!$upload) {
                 $sent = false;
                 echo 'DROPBOX upload manqu�e de '.$file.' vers '.$this->folder.$name;
@@ -41,11 +40,7 @@ class Dropbox extends TransportAbstract
         }
         $streams = $this->backup->getStreamsToBackup();
         foreach ($streams as $stream => $name) {
-            $upload = $this->dropbox->uploadFileFromString(
-                $this->folder . '/' . $name,
-                \Dropbox\WriteMode::force(),
-                $stream
-            );
+            $upload = $this->dropbox->upload($this->folder . '/' . $name, $stream);
             if (!$upload) {
                 $sent = false;
                 echo 'DROPBOX upload manquée de ' . $file . ' vers '.$this->folder.$name;
diff --git a/app/code/backup/Files.php b/app/code/backup/Files.php
index 5b12485..6f67d77 100644
--- a/app/code/backup/Files.php
+++ b/app/code/backup/Files.php
@@ -3,7 +3,6 @@ namespace Shikiryu\Backup\Backup;
 
 class Files extends BackupAbstract
 {
-
     /**
      * @param array $config
      * @throws \Exception
diff --git a/composer.json b/composer.json
old mode 100644
new mode 100755
index 979de44..f06ea70
--- a/composer.json
+++ b/composer.json
@@ -12,13 +12,16 @@
   ],
   "require": {
     "phpseclib/phpseclib": ">=1.0.0",
-    "dropbox/dropbox-sdk": "~1.1",
     "ext-fileinfo": "*",
     "ext-zip": "*",
     "ext-ftp": "*",
     "ext-pdo": "*",
     "ext-mbstring": "*",
-    "ext-json": "*"
+    "ext-json": "*",
+    "spatie/dropbox-api": "^1.11"
+  },
+  "require-dev": {
+    "roave/security-advisories": "dev-master"
   },
   "autoload": {
     "classmap": ["app/code/", "vendor/"]
diff --git a/composer.lock b/composer.lock
new file mode 100755
index 0000000..b542f80
--- /dev/null
+++ b/composer.lock
@@ -0,0 +1,736 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "91afc4d89409c25e123f0a4cd9f3cd81",
+    "packages": [
+        {
+            "name": "graham-campbell/guzzle-factory",
+            "version": "v3.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/GrahamCampbell/Guzzle-Factory.git",
+                "reference": "6ccf9d73c4c2a55b9576f3a6edcf42af44c99fbb"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/GrahamCampbell/Guzzle-Factory/zipball/6ccf9d73c4c2a55b9576f3a6edcf42af44c99fbb",
+                "reference": "6ccf9d73c4c2a55b9576f3a6edcf42af44c99fbb",
+                "shasum": ""
+            },
+            "require": {
+                "guzzlehttp/guzzle": "^6.2",
+                "php": "^7.0"
+            },
+            "require-dev": {
+                "graham-campbell/analyzer": "^2.1",
+                "phpunit/phpunit": "^6.5|^7.0|^8.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "GrahamCampbell\\GuzzleFactory\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Graham Campbell",
+                    "email": "graham@alt-three.com"
+                }
+            ],
+            "description": "Provides A Simple Guzzle Factory With Good Defaults",
+            "keywords": [
+                "Graham Campbell",
+                "GrahamCampbell",
+                "Guzzle",
+                "Guzzle Factory",
+                "Guzzle-Factory",
+                "http"
+            ],
+            "time": "2019-08-23T13:19:30+00:00"
+        },
+        {
+            "name": "guzzlehttp/guzzle",
+            "version": "6.5.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/guzzle/guzzle.git",
+                "reference": "43ece0e75098b7ecd8d13918293029e555a50f82"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/43ece0e75098b7ecd8d13918293029e555a50f82",
+                "reference": "43ece0e75098b7ecd8d13918293029e555a50f82",
+                "shasum": ""
+            },
+            "require": {
+                "ext-json": "*",
+                "guzzlehttp/promises": "^1.0",
+                "guzzlehttp/psr7": "^1.6.1",
+                "php": ">=5.5"
+            },
+            "require-dev": {
+                "ext-curl": "*",
+                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.4 || ^7.0",
+                "psr/log": "^1.1"
+            },
+            "suggest": {
+                "ext-intl": "Required for Internationalized Domain Name (IDN) support",
+                "psr/log": "Required for using the Log middleware"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "6.5-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "GuzzleHttp\\": "src/"
+                },
+                "files": [
+                    "src/functions_include.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Michael Dowling",
+                    "email": "mtdowling@gmail.com",
+                    "homepage": "https://github.com/mtdowling"
+                }
+            ],
+            "description": "Guzzle is a PHP HTTP client library",
+            "homepage": "http://guzzlephp.org/",
+            "keywords": [
+                "client",
+                "curl",
+                "framework",
+                "http",
+                "http client",
+                "rest",
+                "web service"
+            ],
+            "time": "2019-12-23T11:57:10+00:00"
+        },
+        {
+            "name": "guzzlehttp/promises",
+            "version": "v1.3.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/guzzle/promises.git",
+                "reference": "a59da6cf61d80060647ff4d3eb2c03a2bc694646"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/guzzle/promises/zipball/a59da6cf61d80060647ff4d3eb2c03a2bc694646",
+                "reference": "a59da6cf61d80060647ff4d3eb2c03a2bc694646",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.5.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.4-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "GuzzleHttp\\Promise\\": "src/"
+                },
+                "files": [
+                    "src/functions_include.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Michael Dowling",
+                    "email": "mtdowling@gmail.com",
+                    "homepage": "https://github.com/mtdowling"
+                }
+            ],
+            "description": "Guzzle promises library",
+            "keywords": [
+                "promise"
+            ],
+            "time": "2016-12-20T10:07:11+00:00"
+        },
+        {
+            "name": "guzzlehttp/psr7",
+            "version": "1.6.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/guzzle/psr7.git",
+                "reference": "239400de7a173fe9901b9ac7c06497751f00727a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/guzzle/psr7/zipball/239400de7a173fe9901b9ac7c06497751f00727a",
+                "reference": "239400de7a173fe9901b9ac7c06497751f00727a",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.4.0",
+                "psr/http-message": "~1.0",
+                "ralouphie/getallheaders": "^2.0.5 || ^3.0.0"
+            },
+            "provide": {
+                "psr/http-message-implementation": "1.0"
+            },
+            "require-dev": {
+                "ext-zlib": "*",
+                "phpunit/phpunit": "~4.8.36 || ^5.7.27 || ^6.5.8"
+            },
+            "suggest": {
+                "zendframework/zend-httphandlerrunner": "Emit PSR-7 responses"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.6-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "GuzzleHttp\\Psr7\\": "src/"
+                },
+                "files": [
+                    "src/functions_include.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Michael Dowling",
+                    "email": "mtdowling@gmail.com",
+                    "homepage": "https://github.com/mtdowling"
+                },
+                {
+                    "name": "Tobias Schultze",
+                    "homepage": "https://github.com/Tobion"
+                }
+            ],
+            "description": "PSR-7 message implementation that also provides common utility methods",
+            "keywords": [
+                "http",
+                "message",
+                "psr-7",
+                "request",
+                "response",
+                "stream",
+                "uri",
+                "url"
+            ],
+            "time": "2019-07-01T23:21:34+00:00"
+        },
+        {
+            "name": "phpseclib/phpseclib",
+            "version": "2.0.23",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpseclib/phpseclib.git",
+                "reference": "c78eb5058d5bb1a183133c36d4ba5b6675dfa099"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpseclib/phpseclib/zipball/c78eb5058d5bb1a183133c36d4ba5b6675dfa099",
+                "reference": "c78eb5058d5bb1a183133c36d4ba5b6675dfa099",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "require-dev": {
+                "phing/phing": "~2.7",
+                "phpunit/phpunit": "^4.8.35|^5.7|^6.0",
+                "sami/sami": "~2.0",
+                "squizlabs/php_codesniffer": "~2.0"
+            },
+            "suggest": {
+                "ext-gmp": "Install the GMP (GNU Multiple Precision) extension in order to speed up arbitrary precision integer arithmetic operations.",
+                "ext-libsodium": "SSH2/SFTP can make use of some algorithms provided by the libsodium-php extension.",
+                "ext-mcrypt": "Install the Mcrypt extension in order to speed up a few other cryptographic operations.",
+                "ext-openssl": "Install the OpenSSL extension in order to speed up a wide variety of cryptographic operations."
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "phpseclib/bootstrap.php"
+                ],
+                "psr-4": {
+                    "phpseclib\\": "phpseclib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Jim Wigginton",
+                    "email": "terrafrost@php.net",
+                    "role": "Lead Developer"
+                },
+                {
+                    "name": "Patrick Monnerat",
+                    "email": "pm@datasphere.ch",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Andreas Fischer",
+                    "email": "bantu@phpbb.com",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Hans-Jürgen Petrich",
+                    "email": "petrich@tronic-media.com",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Graham Campbell",
+                    "email": "graham@alt-three.com",
+                    "role": "Developer"
+                }
+            ],
+            "description": "PHP Secure Communications Library - Pure-PHP implementations of RSA, AES, SSH2, SFTP, X.509 etc.",
+            "homepage": "http://phpseclib.sourceforge.net",
+            "keywords": [
+                "BigInteger",
+                "aes",
+                "asn.1",
+                "asn1",
+                "blowfish",
+                "crypto",
+                "cryptography",
+                "encryption",
+                "rsa",
+                "security",
+                "sftp",
+                "signature",
+                "signing",
+                "ssh",
+                "twofish",
+                "x.509",
+                "x509"
+            ],
+            "time": "2019-09-17T03:41:22+00:00"
+        },
+        {
+            "name": "psr/http-message",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-message.git",
+                "reference": "f6561bf28d520154e4b0ec72be95418abe6d9363"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/http-message/zipball/f6561bf28d520154e4b0ec72be95418abe6d9363",
+                "reference": "f6561bf28d520154e4b0ec72be95418abe6d9363",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Http\\Message\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for HTTP messages",
+            "homepage": "https://github.com/php-fig/http-message",
+            "keywords": [
+                "http",
+                "http-message",
+                "psr",
+                "psr-7",
+                "request",
+                "response"
+            ],
+            "time": "2016-08-06T14:39:51+00:00"
+        },
+        {
+            "name": "ralouphie/getallheaders",
+            "version": "3.0.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/ralouphie/getallheaders.git",
+                "reference": "120b605dfeb996808c31b6477290a714d356e822"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/ralouphie/getallheaders/zipball/120b605dfeb996808c31b6477290a714d356e822",
+                "reference": "120b605dfeb996808c31b6477290a714d356e822",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.6"
+            },
+            "require-dev": {
+                "php-coveralls/php-coveralls": "^2.1",
+                "phpunit/phpunit": "^5 || ^6.5"
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "src/getallheaders.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Ralph Khattar",
+                    "email": "ralph.khattar@gmail.com"
+                }
+            ],
+            "description": "A polyfill for getallheaders.",
+            "time": "2019-03-08T08:55:37+00:00"
+        },
+        {
+            "name": "spatie/dropbox-api",
+            "version": "1.11.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/spatie/dropbox-api.git",
+                "reference": "338dbffe1a5dc10145b40c07804a03e3f0eeb0c4"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/spatie/dropbox-api/zipball/338dbffe1a5dc10145b40c07804a03e3f0eeb0c4",
+                "reference": "338dbffe1a5dc10145b40c07804a03e3f0eeb0c4",
+                "shasum": ""
+            },
+            "require": {
+                "graham-campbell/guzzle-factory": "^3.0",
+                "guzzlehttp/guzzle": "^6.2",
+                "php": "^7.1"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^7.5.15|^8.5"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Spatie\\Dropbox\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Alex Vanderbist",
+                    "email": "alex.vanderbist@gmail.com",
+                    "homepage": "https://spatie.be",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Freek Van der Herten",
+                    "email": "freek@spatie.be",
+                    "homepage": "https://spatie.be",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A minimal implementation of Dropbox API v2",
+            "homepage": "https://github.com/spatie/dropbox-api",
+            "keywords": [
+                "Dropbox-API",
+                "api",
+                "dropbox",
+                "spatie",
+                "v2"
+            ],
+            "time": "2019-12-12T11:54:27+00:00"
+        }
+    ],
+    "packages-dev": [
+        {
+            "name": "roave/security-advisories",
+            "version": "dev-master",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/Roave/SecurityAdvisories.git",
+                "reference": "666ba252853924887ac57dc9f66e6b6af78d5a76"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/Roave/SecurityAdvisories/zipball/666ba252853924887ac57dc9f66e6b6af78d5a76",
+                "reference": "666ba252853924887ac57dc9f66e6b6af78d5a76",
+                "shasum": ""
+            },
+            "conflict": {
+                "3f/pygmentize": "<1.2",
+                "adodb/adodb-php": "<5.20.12",
+                "alterphp/easyadmin-extension-bundle": ">=1.2,<1.2.11|>=1.3,<1.3.1",
+                "amphp/artax": "<1.0.6|>=2,<2.0.6",
+                "amphp/http": "<1.0.1",
+                "api-platform/core": ">=2.2,<2.2.10|>=2.3,<2.3.6",
+                "asymmetricrypt/asymmetricrypt": ">=0,<9.9.99",
+                "aws/aws-sdk-php": ">=3,<3.2.1",
+                "brightlocal/phpwhois": "<=4.2.5",
+                "bugsnag/bugsnag-laravel": ">=2,<2.0.2",
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+                "zendframework/zendopenid": ">=2,<2.0.2",
+                "zendframework/zendxml": ">=1,<1.0.1",
+                "zetacomponents/mail": "<1.8.2",
+                "zf-commons/zfc-user": "<1.2.2",
+                "zfcampus/zf-apigility-doctrine": ">=1,<1.0.3",
+                "zfr/zfr-oauth2-server-module": "<0.1.2"
+            },
+            "type": "metapackage",
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Marco Pivetta",
+                    "email": "ocramius@gmail.com",
+                    "role": "maintainer"
+                },
+                {
+                    "name": "Ilya Tribusean",
+                    "email": "slash3b@gmail.com",
+                    "role": "maintainer"
+                }
+            ],
+            "description": "Prevents installation of composer packages with known security vulnerabilities: no API, simply require it",
+            "time": "2020-01-28T17:25:41+00:00"
+        }
+    ],
+    "aliases": [],
+    "minimum-stability": "stable",
+    "stability-flags": {
+        "roave/security-advisories": 20
+    },
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": {
+        "ext-fileinfo": "*",
+        "ext-zip": "*",
+        "ext-ftp": "*",
+        "ext-pdo": "*",
+        "ext-mbstring": "*",
+        "ext-json": "*"
+    },
+    "platform-dev": []
+}