diff --git a/README.md b/README.md
index 0a7e20c..7391d1d 100644
--- a/README.md
+++ b/README.md
@@ -106,20 +106,23 @@ Merge the contents of two or more objects together into the first object.
 	* **Required**
 	
 * `$params->objects`
-	* Desctription: Objects to merge.
+	* Desctription: Objects or arrays to merge.
 	* Valid values: `array`
 	* **Required**
 	
 * `$params->objects[0]`
-	* Desctription: The object to extend. It will receive the new properties.
+	* Desctription: The object or array to extend. It will receive the new properties.
 	* Valid values:
 		* `object`
+		* `array`
 		* `NULL` — pass `NULL` to create the new StdClass.
 	* **Required**
 	
 * `$params->objects[i]`
-	* Desctription: An object containing additional properties to merge in.
-	* Valid values: `object`
+	* Desctription: An object or array containing additional properties to merge in.
+	* Valid values:
+		* `object`
+		* `array`
 	* **Required**
 	
 * `$params->deep`
@@ -183,7 +186,8 @@ extract(\ddTools::verifyRenamedParams([
 
 #### `\DDTools\ObjectTools::extend($params)`
 
-Merge two objects, modifying the first.
+
+##### Merge two objects, modifying the first
 
 ```php
 var_export(\DDTools\ObjectTools::extend([
@@ -208,7 +212,7 @@ var_export(\DDTools\ObjectTools::extend([
 
 Returns:
 
-```
+```php
 stdClass::__set_state(array(
 	'cat' => 'mew',
 	'dog' => stdClass::__set_state(array(
@@ -221,6 +225,44 @@ stdClass::__set_state(array(
 ```
 
 
+##### Also you can extend arrays
+
+```php
+var_export(\DDTools\ObjectTools::extend([
+	'objects' => [
+		[
+			'cat' => 'mew',
+			'dog' => [
+				'name' => 'Floyd',
+				'weight' => 6
+			],
+			'rabbit' => 42
+		],
+		[
+			'dog' => (object) [
+				'weight' => 10
+			],
+			'bird' => 0
+		]
+	]
+]));
+```
+
+Returns:
+
+```php
+array(
+	'cat' => 'mew',
+	'dog' => array(
+		'name' => 'Floyd',
+		'weight' => 10,
+	),
+	'rabbit' => 42,
+	'bird' => 0,
+)
+```
+
+
 ## [Home page →](https://code.divandesign.biz/modx/ddtools)
 
 
diff --git a/src/ObjectTools/ObjectTools.php b/src/ObjectTools/ObjectTools.php
index 806dea6..00da23a 100644
--- a/src/ObjectTools/ObjectTools.php
+++ b/src/ObjectTools/ObjectTools.php
@@ -4,11 +4,11 @@
 class ObjectTools {
 	/**
 	 * extend
-	 * @version 1.0 (2020-04-23)
+	 * @version 1.1 (2020-04-28)
 	 * 
 	 * @see README.md
 	 * 
-	 * @return {object}
+	 * @return {object|array}
 	 */
 	public static function extend($params){
 		//Defaults
@@ -19,19 +19,29 @@ public static function extend($params){
 			(array) $params
 		);
 		
-		//The first object is the target
+		//The first item is the target
 		$result = array_shift($params->objects);
 		//Empty or invalid target
-		if (!is_object($result)){
+		if (
+			!is_object($result) &&
+			!is_array($result)
+		){
 			$result = new \stdClass();
 		}
 		
+		$isResultObject = is_object($result);
+		$checkFunction =
+			$isResultObject ?
+			'is_object' :
+			'is_array'
+		;
+		
 		foreach (
 			$params->objects as
 			$additionalProps
 		){
 			//Invalid objects will not be used
-			if (is_object($additionalProps)){
+			if ($checkFunction($additionalProps)){
 				foreach (
 					$additionalProps as
 					$additionalPropName =>
@@ -41,19 +51,27 @@ public static function extend($params){
 						//If recursive merging is needed
 						$params->deep &&
 						//And the value is an object
-						is_object($additionalPropValue)
+						$checkFunction($additionalPropValue)
 					){
 						//Start recursion
-						$result->{$additionalPropName} = self::extend([
+						$additionalPropValue = self::extend([
 							'objects' => [
-								$result->{$additionalPropName},
+								(
+									$isResultObject ?
+									$result->{$additionalPropName} :
+									$result[$additionalPropName]
+								),
 								$additionalPropValue
 							],
 							'deep' => true
 						]);
-					}else{
-						//Save the new value (replace preverious or create the new property)
+					}
+					
+					//Save the new value (replace preverious or create the new property)
+					if ($isResultObject){
 						$result->{$additionalPropName} = $additionalPropValue;
+					}else{
+						$result[$additionalPropName] = $additionalPropValue;
 					}
 				}
 			}