diff --git a/README-SK.texy b/README-SK.texy
deleted file mode 100644
index 8e9c3c8..0000000
--- a/README-SK.texy
+++ /dev/null
@@ -1,87 +0,0 @@
-ThumbnailHelper
-****************
-
-Generovanie náhľadov k obrázkom v šablóne. .[perex]
-
-|Verzia | 0.8
-| Github | https://github.com/Kollarovic/ThumbnailHelper
-|Autor | Mário Kollarovič
-|Licencia | New BSD License
-
-
-Použitie v šablóne
---------------------------
-
-/--html
-
-{var $image='images/image.jpg'}
-
-<img src="{$image|thumbnail: 150, 150}" />
-
-\--
-
-Helper skontroluje či existuje náhľad k obrázku a či je aktuálny. Ak nie, tak ho vygeneruje a uloží 
-podľa nastavenia. Poprípade vytvorí potrebné podadresáre. Helper vracia cestu k náhľadu.
-
-Inštalácia
----------------
-
-Skopírujeme triedy do aplikácie najlepšie cez composer - `composer.json`:
-
-/-- code js
-
-{
-	"require":{
-		"kollarovic/thumbnail": "dev-master"
-	}
-}
-
-\--
-
-V `app/config/config.neon` zaregistrujeme rozšírenie:
-
-/-- code neon
-
-extensions:
-	thumbnail: Kollarovic\Thumbnail\DI\Extension
-	
-\--
-
-
-Konfigurácia
----------------
-
-Konfigurácia je nepovinná a zadávame ju do `app/config/config.neon`, do sekcie `thumbnail`. 
-Na výpise sú štandardné hodnoty:
-
-/-- code neon
-
-common:
-	thumbnail:
-		thumbPathMask: 'images/thumbs/{filename}-{width}x{height}.{extension}'
-		placeholder: 'http://dummyimage.com/{width}x{height}/efefef/f00&text=Image+not+found'
-\--
-
-
-Parameter `thumbPathMask` je maska pre cestu ukladania náhľadov.
-
-napr pre `{='images/product.jpg'|thumbnail: 150, 150}`
-
-|* Maska |* Vygeneruje
-|images/{filename}-{width}x{height}.{extension}| images/product-150x150.jpg
-|images/cache/{width}x{height}/{filename}.{extension}| images/cache/150x150/product.jpg
-
-Parameter `placeholder` je url obrázku, ktoré bude vrátené v prípade, že zdrojový obrázok neexistuje. 
-Url je formátované obdobne ako `thumbPathMask`.
-
-napr:
-
-/-- code neon
-
-http://dummyimage.com/{width}x{height}/efefef/f00&text=Image+not+found
-http://placehold.it/{width}x{height}&text={src}+not+found
-http://example.com/images/none.png
-
-\--
-
-{{author: Mario Kollarovic|8230}}
diff --git a/README.md b/README.md
index 7eb9a39..e9f867f 100644
--- a/README.md
+++ b/README.md
@@ -13,13 +13,8 @@ Installation
 
 composer.json
 
-```json
-{
-    "require":{
-        "kollarovic/thumbnail": "dev-master"
-    }
-}
-
+```
+composer require kollarovic/thumbnail
 ```
 
 config.neon
diff --git a/composer.json b/composer.json
index 8b126fb..fa6fe5a 100644
--- a/composer.json
+++ b/composer.json
@@ -12,13 +12,17 @@
 	],
 
 	"require": {
-		"php": ">=5.3.1",
-		"nette/nette": "~2.0@rc"
+		"php": ">=7.1",
+		"nette/bootstrap": "^3.0",
+		"nette/utils": "^3.0",
+		"nette/http": "^3.0",
+		"nette/application": "^3.0",
+		"latte/latte": "^2.5"
 	},
 
 	"require-dev": {
 		"nette/tester": "~1.3",
-		"mockery/mockery": "~0.9"
+		"mockery/mockery": "~1.0"
 	},
 
 	"autoload": {
diff --git a/src/Kollarovic/Thumbnail/AbstractGenerator.php b/src/Kollarovic/Thumbnail/AbstractGenerator.php
index ff72f58..f893ec0 100644
--- a/src/Kollarovic/Thumbnail/AbstractGenerator.php
+++ b/src/Kollarovic/Thumbnail/AbstractGenerator.php
@@ -2,18 +2,18 @@
 
 namespace Kollarovic\Thumbnail;
 
-use Nette,
-	Nette\Http\IRequest;
+use Nette;
+use    Nette\Http\IRequest;
 
 
 /**
-* @author  Mario Kollarovic
-*
-* AbstractGenerator
-*/
+ * @author  Mario Kollarovic
+ *
+ * AbstractGenerator
+ */
 abstract class AbstractGenerator
 {
-	
+
 	/** @var string */
 	protected $src;
 
@@ -32,7 +32,7 @@ abstract class AbstractGenerator
 	/** @var string */
 	private $wwwDir;
 
-	/** @var Nette\Http\IRequest */
+	/** @var IRequest */
 	private $httpRequest;
 
 	/** @var string */
@@ -44,7 +44,7 @@ abstract class AbstractGenerator
 
 	/**
 	 * @param string
-	 * @param Nette\Http\IRequest
+	 * @param IRequest
 	 * @param string
 	 * @param string
 	 */
@@ -64,7 +64,7 @@ function __construct($wwwDir, IRequest $httpRequest, $thumbPathMask, $placeholde
 	 * @param bool
 	 * @return string
 	 */
-	public function thumbnail($src, $width, $height = NULL, $crop = false )
+	public function thumbnail($src, $width, $height = NULL, $crop = false)
 	{
 		$this->src = $this->wwwDir . '/' . $src;
 		$this->width = $width;
@@ -84,7 +84,7 @@ public function thumbnail($src, $width, $height = NULL, $crop = false )
 			clearstatcache();
 		}
 
-		return $this->httpRequest->url->basePath . $thumbRelPath;
+		return $this->httpRequest->getUrl()->basePath . $thumbRelPath;
 	}
 
 
@@ -109,13 +109,13 @@ private function createDir()
 	/**
 	 * @return string
 	 */
-	private function createThumbPath() 
+	private function createThumbPath()
 	{
 		$pathinfo = pathinfo($this->src);
 		$md5 = md5($this->src);
 		$md5Dir = $md5[0] . "/" . $md5[1] . "/" . $md5[2] . "/" . $md5;
 		$search = array('{width}', '{height}', '{crop}', '{filename}', '{extension}', "{md5}");
-		$replace = array($this->width, $this->height, (int) $this->crop, $pathinfo['filename'], $pathinfo['extension'], $md5Dir);
+		$replace = array($this->width, $this->height, (int)$this->crop, $pathinfo['filename'], $pathinfo['extension'], $md5Dir);
 		return str_replace($search, $replace, $this->thumbPathMask);
 	}
 
@@ -125,8 +125,8 @@ private function createThumbPath()
 	 */
 	private function createPlaceholderPath()
 	{
-		$width = $this->width===NULL ? $this->height : $this->width;
-		$height = $this->height===NULL ? $this->width : $this->height;
+		$width = $this->width === NULL ? $this->height : $this->width;
+		$height = $this->height === NULL ? $this->width : $this->height;
 		$search = array('{width}', '{height}', '{src}');
 		$replace = array($width, $height, $this->src);
 		return str_replace($search, $replace, $this->placeholder);
diff --git a/src/Kollarovic/Thumbnail/DI/Extension.php b/src/Kollarovic/Thumbnail/DI/Extension.php
index 29c959c..03af102 100644
--- a/src/Kollarovic/Thumbnail/DI/Extension.php
+++ b/src/Kollarovic/Thumbnail/DI/Extension.php
@@ -5,11 +5,6 @@
 use Nette;
 
 
-if (!class_exists('Nette\DI\CompilerExtension')) {
-	class_alias('Nette\Config\CompilerExtension', 'Nette\DI\CompilerExtension');
-}
-
-
 /**
  * Extension
  *
@@ -18,22 +13,22 @@ class_alias('Nette\Config\CompilerExtension', 'Nette\DI\CompilerExtension');
 class Extension extends Nette\DI\CompilerExtension
 {
 
-	public $defaults = array(
-		'wwwDir' => '%wwwDir%',
-		'httpRequest' => '@httpRequest',
-		'thumbPathMask' => 'images/thumbs/{filename}-{width}x{height}.{extension}',
-		'placeholder' => 'http://dummyimage.com/{width}x{height}/efefef/f00&text=Image+not+found',
-		'filterName' => 'thumbnail',
-	);
-
-
 	public function loadConfiguration()
 	{
-		$config = $this->getConfig($this->defaults);
 		$builder = $this->getContainerBuilder();
 
+		$defaults = [
+			'wwwDir' => $builder->parameters['wwwDir'],
+			'httpRequest' => '@httpRequest',
+			'thumbPathMask' => 'images/thumbs/{filename}-{width}x{height}.{extension}',
+			'placeholder' => 'http://dummyimage.com/{width}x{height}/efefef/f00&text=Image+not+found',
+			'filterName' => 'thumbnail',
+		];
+
+		$config = $this->validateConfig($defaults);
+
 		$builder->addDefinition($this->prefix('thumbnail'))
-			->setClass('Kollarovic\Thumbnail\Generator', array(
+			->setFactory('Kollarovic\Thumbnail\Generator', array(
 				'wwwDir' => $config['wwwDir'],
 				'httpRequest' => $config['httpRequest'],
 				'thumbPathMask' => $config['thumbPathMask'],
@@ -42,8 +37,8 @@ public function loadConfiguration()
 
 		if ($builder->hasDefinition('nette.latteFactory')) {
 			$definition = $builder->getDefinition('nette.latteFactory');
-			$definition->addSetup('addFilter', array($config['filterName'], array($this->prefix('@thumbnail'), 'thumbnail')));
+			$definition->getResultDefinition()->addSetup('addFilter', array($config['filterName'], array($this->prefix('@thumbnail'), 'thumbnail')));
 		}
 	}
 
-}
+}
\ No newline at end of file
diff --git a/src/Kollarovic/Thumbnail/Generator.php b/src/Kollarovic/Thumbnail/Generator.php
index 5fafe94..df33444 100644
--- a/src/Kollarovic/Thumbnail/Generator.php
+++ b/src/Kollarovic/Thumbnail/Generator.php
@@ -2,24 +2,24 @@
 
 namespace Kollarovic\Thumbnail;
 
-use Nette;
+use Nette\Utils\Image;
 
 
 /**
-* @author  Mario Kollarovic
-*
-* Generator
-*/
+ * @author  Mario Kollarovic
+ *
+ * Generator
+ */
 class Generator extends AbstractGenerator
 {
 
 	/**
 	 * @return void
- 	 */
+	 */
 	protected function createThumb()
 	{
-		$image = Nette\Image::fromFile($this->src);
-		$image->resize($this->width, $this->height, $this->crop ? Nette\Image::EXACT : Nette\Image::FIT);
+		$image = Image::fromFile($this->src);
+		$image->resize($this->width, $this->height, $this->crop ? Image::EXACT : Image::FIT);
 		$image->save($this->desc);
 	}
 
diff --git a/tests/Thumbnail/TemplateFilter.phpt b/tests/Thumbnail/TemplateFilter.phpt
index 6186c14..9f9e967 100644
--- a/tests/Thumbnail/TemplateFilter.phpt
+++ b/tests/Thumbnail/TemplateFilter.phpt
@@ -40,6 +40,7 @@ class TemplateFilterTest extends TestCase
 		$mockControl = Mockery::mock('Nette\Application\UI\Control');
 		$mockControl->shouldReceive('getPresenter')->andReturnNull();
 		$mockControl->shouldReceive('templatePrepareFilters');
+        $mockControl->shouldReceive('hasPresenter')->andReturn(true);
 		return $container->getByType('Nette\Application\UI\ITemplateFactory')->createTemplate($mockControl);
 	}
 }
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 7e83620..74a5d84 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -8,13 +8,11 @@
 
 $autoload->addPsr4('Kollarovic\Thumbnail\Test\\', __DIR__ . '/Thumbnail');
 
-
-Tester\Environment::setup();
-
 define('TEMP_DIR', __DIR__ . '/temp');
+Nette\Utils\FileSystem::delete(TEMP_DIR . '/cache');
 
+Tester\Environment::setup();
 
 function run(Tester\TestCase $testCase) {
 	$testCase->run(isset($_SERVER['argv'][1]) ? $_SERVER['argv'][1] : NULL);
 }
-