diff --git a/README.md b/README.md
index dc71020..0fa58bf 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@
 
 * PHP >= 5.4
 * [(MODX)EvolutionCMS](https://github.com/evolution-cms/evolution) >= 1.1
-* [(MODX)EvolutionCMS.libraries.ddTools](http://code.divandesign.biz/modx/ddtools) >= 0.28
+* [(MODX)EvolutionCMS.libraries.ddTools](http://code.divandesign.biz/modx/ddtools) >= 0.33.1
 
 
 ## Documentation
@@ -33,6 +33,13 @@ Elements → Snippets: Create a new snippet with the following data:
 		* `stringQueryFormated` — as [Query string](https://en.wikipedia.org/wiki/Query_string)
 	* Default value: —
 	
+* `save_extendExisting`
+	* Desctription: Extend an existing object instead of overwriting it.
+	* Valid values:
+		* `0`
+		* `1`
+	* Default value: `0`
+	
 * `get`
 	* Desctription: Data key for getting from stash.
 	* Valid values: `string`
@@ -174,4 +181,94 @@ Returns:
 ```
 
 
+#### Save: Extend an existing object instead of overwriting it (``&save_extendExisting=`1` ``)
+
+First you save some object:
+
+```
+[[ddStash?
+	&save=`{
+		"userData": {
+			"firstName": "Chuck",
+			"lastName": "Doe",
+			"children": [
+				{
+					"firstName": "Alice"
+				},
+				{
+					"firstName": "Robert"
+				}
+			]
+		}
+	}`
+]]
+```
+
+Then if you just save object with the same key (`userData`):
+
+```
+[[ddStash?
+	&save=`{
+		"userData": {
+			"middleName": "Ray",
+			"lastName": "Norris"
+		}
+	}`
+]]
+```
+
+The snippet will overwrite previous saved object completely:
+
+```
+[[ddStash? &get=`userData`]]
+```
+
+Returns:
+
+```json
+{
+	"middleName": "Ray",
+	"lastName": "Norris"
+}
+```
+
+So, if you want to extend the first object just use the `save_extendExisting` parameter:
+
+```
+[[ddStash?
+	&save=`{
+		"userData": {
+			"middleName": "Ray",
+			"lastName": "Norris"
+		}
+	}`
+	&save_extendExisting=`1`
+]]
+```
+
+In this case the snippet will recursive extend the first object with the data from the second:
+
+```
+[[ddStash? &get=`userData`]]
+```
+
+Returns:
+
+```json
+{
+	"firstName": "Chuck",
+	"middleName": "Ray",
+	"lastName": "Norris",
+	"children": [
+		{
+			"firstName": "Alice"
+		},
+		{
+			"firstName": "Robert"
+		}
+	]
+}
+```
+
+
 <link rel="stylesheet" type="text/css" href="https://DivanDesign.ru/assets/files/ddMarkdown.css" />
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 4801255..961e0d2 100644
--- a/composer.json
+++ b/composer.json
@@ -15,6 +15,6 @@
 	],
 	"require": {
 		"php": ">=5.4.0",
-		"dd/modxevo-library-ddtools": ">=0.28.0"
+		"dd/modxevo-library-ddtools": ">=0.33.1"
 	}
 }
\ No newline at end of file
diff --git a/ddStash_snippet.php b/ddStash_snippet.php
index 4dfe6a1..5373a46 100644
--- a/ddStash_snippet.php
+++ b/ddStash_snippet.php
@@ -37,6 +37,12 @@
 
 //Save to stash
 if (isset($save)){
+	$save_extendExisting =
+		isset($save_extendExisting) ?
+		boolval($save_extendExisting) :
+		false
+	;
+	
 	$save = \ddTools::encodedStringToArray($save);
 	
 	foreach (
@@ -44,7 +50,25 @@
 		$dataName =>
 		$dataValue
 	){
-		$storage['ddStash.' . $dataName] = $dataValue;
+		$dataName =
+			'ddStash.' .
+			$dataName
+		;
+		
+		//If need to extend existing
+		if (
+			$save_extendExisting &&
+			isset($storage[$dataName])
+		){
+			$storage[$dataName] = \DDTools\ObjectTools::extend([
+				'objects' => [
+					$storage[$dataName],
+					$dataValue
+				]
+			]);
+		}else{
+			$storage[$dataName] = $dataValue;
+		}
 	}
 }