diff --git a/README.md b/README.md
index cd61f53..11264f4 100644
--- a/README.md
+++ b/README.md
@@ -2,11 +2,11 @@
 
 This component allow you to inject DTO object mapped from the Request to the action.
 
-## How to use?
+## 1. How to use?
 
-### Create DTO from the Request
+### 1.1. Create DTO from the Request
 
-#### Easy way (in case if you want to map data from the $request->all())
+#### 1.1.1 Easy way (in case if you want to map data from the $request->all())
 You should extend DataTransferObject.php class and define your rules for mapping and validation. Example:
 
 ```PHP
@@ -51,7 +51,41 @@ final class RoomSearchRequestData extends DataTransferObject
 }
 ```
 
-### Change rendering of the exception
+#### 1.1.2 Configure DTO parameter in the construct via ServiceProvider
+
+```PHP
+<?php
+declare(strict_types = 1);
+
+namespace App\Http;
+
+use Illuminate\Http\Request;
+use Maksi\RequestMapperL\Support\RequestMapperServiceProvider;
+
+/**
+ * Class RequestMapperProvider
+ *
+ * @package App\Http
+ */
+class RequestMapperProvider extends RequestMapperServiceProvider
+{
+    /**
+     * @param Request $request
+     *
+     * @return array
+     */
+    protected function resolveMap(Request $request): array
+    {
+        return [
+            RoomSearchRequestData::class => $request->all(), // RoomSearchRequestData DTO class
+        ];
+    }
+}
+
+```
+
+
+### 1.2. Change rendering of the exception
 
 1. Create Exception which will extend /Exception/AbstractException.php and implement toResponse method
 
@@ -88,7 +122,6 @@ return [
 
 ```
 
-## Todo
+## 1.3. Todo
 - check nested DTO validation
 - contextual binding
-- re-check DTO creating via ServiceProvider define
diff --git a/src/RequestMapperResolver.php b/src/RequestMapperResolver.php
index fecd221..b200eff 100644
--- a/src/RequestMapperResolver.php
+++ b/src/RequestMapperResolver.php
@@ -22,7 +22,7 @@ class RequestMapperResolver
     /**
      * @var array
      */
-    private $map;
+    private $map = [];
 
     /**
      * @var Config
@@ -58,10 +58,14 @@ public function __construct(Config $config, Container $container, ValidatorInter
      */
     public function map(array $map): void
     {
-        $this->map = $map;
+        $this->map = array_merge($this->map, $map);
         foreach ($map as $className => $arguments) {
             $this->container->singleton($className, function () use ($className, $arguments) {
-                return new $className(... $arguments);
+                if (!\is_array($arguments)) {
+                    throw new \InvalidArgumentException('$arguments should be array');
+                }
+
+                return new $className($arguments);
             });
             $this->container->afterResolving($className, function ($resolved) {
                 $this->applyAfterResolvingValidation($resolved);
@@ -74,7 +78,7 @@ public function map(array $map): void
      */
     public function getRegisterClass(): array
     {
-        return array_keys($this->map ?? []);
+        return array_keys($this->map);
     }
 
     /**