diff --git a/README.md b/README.md
new file mode 100644
index 0000000..ca99f03
--- /dev/null
+++ b/README.md
@@ -0,0 +1,7 @@
+[![continuousphp](https://img.shields.io/continuousphp/git-hub/Pierozi/Validator/master.svg)](https://app.continuousphp.com/git-hub/Pierozi/Validator) ![Packagist](https://img.shields.io/packagist/v/plab/validator.svg)
+
+# Validator
+Validator and transform parameter with rules
+
+## Related Project
+The rule use in this library are based on the famous [Hoa\Ruler](github.com/hoaproject/ruler) library
diff --git a/composer.json b/composer.json
index 36d709f..40dfbe9 100644
--- a/composer.json
+++ b/composer.json
@@ -7,12 +7,12 @@
   "require": {
     "php": ">=7.2.0",
     "hoa/ruler": "~2.0",
-    "hoa/ustring": "~4.0",
-    "atoum/atoum": "^3.3",
-    "atoum/stubs": "^2.6"
+    "hoa/ustring": "~4.0"
   },
   "require-dev": {
-    "phpstan/phpstan": "^0.10.1"
+    "phpstan/phpstan": "^0.10.1",
+    "atoum/atoum": "^3.3",
+    "atoum/stubs": "^2.6"
   },
   "autoload": {
     "psr-4": {
diff --git a/docker-compose.yml b/docker-compose.yml
deleted file mode 100644
index 162be97..0000000
--- a/docker-compose.yml
+++ /dev/null
@@ -1,5 +0,0 @@
-php:
-  image: plab/docker-php:7.0-fpm
-  volumes:
-    - .:/app
-  command: 'php-fpm'
diff --git a/src/Parameters.php b/src/Parameters.php
index 002e774..a7b5fe9 100644
--- a/src/Parameters.php
+++ b/src/Parameters.php
@@ -20,11 +20,19 @@ class Parameters implements \Iterator, \Countable
     /**
      * Parameters constructor.
      * @param string $parameterClassName
-     * @param \Traversable $parameters, must be Traversable
+     * @param mixed $parameters must be Traversable
      * @throws \Exception
      */
-    public function __construct(string $parameterClassName, \Traversable $parameters)
+    public function __construct(string $parameterClassName, $parameters)
     {
+        if (false === is_array($parameters)
+            && false === ($parameters instanceof \stdClass)
+            && false === ($parameters instanceof \Iterator)
+            && false === ($parameters instanceof \Traversable)
+        ) {
+            throw new \Exception('Parameters must be an array or traversable object');
+        }
+
         $this->iterator = new \ArrayIterator();
 
         foreach ($parameters as $key => $value) {
diff --git a/tests/units/Fixtures/Parameters.php b/tests/units/Fixtures/Parameters.php
new file mode 100644
index 0000000..6244130
--- /dev/null
+++ b/tests/units/Fixtures/Parameters.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace Plab\Validator\tests\unit;
+
+use atoum\test;
+
+class Parameters extends test
+{
+    public function test__construct()
+    {
+        $data = json_decode('{"city": "Lux"}');
+
+        $this
+            ->given(
+                $this->newTestedInstance(\Plab\Validator\Fixtures\Parameter::class, $data),
+                $result = $this->testedInstance->isValid()
+            )
+            ->variable($result)
+            ->isEqualTo(true)
+        ;
+    }
+}
\ No newline at end of file