diff --git a/composer.json b/composer.json
index c8003ce..96760d2 100644
--- a/composer.json
+++ b/composer.json
@@ -11,11 +11,12 @@
         }
     ],
     "require": {
-        "league/glide-symfony": "^1.0"
+        "league/glide-symfony": "^2.0",
+        "league/flysystem": "^2.0"
     },
     "require-dev": {
-        "mockery/mockery": "^0.9",
-        "phpunit/phpunit": "^4.0"
+        "mockery/mockery": "^1.4.4",
+        "phpunit/phpunit": "~8.5|^9.5.10"
     },
     "autoload": {
         "psr-4": {
diff --git a/tests/Responses/LaravelResponseFactoryTest.php b/tests/Responses/LaravelResponseFactoryTest.php
index bd6db28..6075018 100644
--- a/tests/Responses/LaravelResponseFactoryTest.php
+++ b/tests/Responses/LaravelResponseFactoryTest.php
@@ -3,10 +3,12 @@
 namespace League\Glide\Responses;
 
 use Mockery;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\HttpFoundation\StreamedResponse;
 
-class LaravelResponseFactoryTest extends \PHPUnit_Framework_TestCase
+class LaravelResponseFactoryTest extends TestCase
 {
-    public function tearDown()
+    protected function tearDown(): void
     {
         Mockery::close();
     }
@@ -21,19 +23,19 @@ public function testCreateInstance()
 
     public function testCreate()
     {
-        $this->cache = Mockery::mock('League\Flysystem\FilesystemInterface', function ($mock) {
-            $mock->shouldReceive('getMimetype')->andReturn('image/jpeg')->once();
-            $mock->shouldReceive('getSize')->andReturn(0)->once();
-            $mock->shouldReceive('readStream');
+        $this->cache = Mockery::mock('League\Flysystem\FilesystemOperator', function ($mock) {
+            $mock->shouldReceive('mimeType')->andReturn('image/jpeg')->once();
+            $mock->shouldReceive('fileSize')->andReturn(0)->once();
+            $mock->shouldReceive('readStream')->andReturn(fopen('php://memory', 'r'))->once();
         });
 
         $factory = new LaravelResponseFactory();
         $response = $factory->create($this->cache, '');
 
-        $this->assertInstanceOf('Symfony\Component\HttpFoundation\StreamedResponse', $response);
+        $this->assertInstanceOf(StreamedResponse::class, $response);
         $this->assertEquals('image/jpeg', $response->headers->get('Content-Type'));
         $this->assertEquals('0', $response->headers->get('Content-Length'));
-        $this->assertContains(gmdate('D, d M Y H:i', strtotime('+1 years')), $response->headers->get('Expires'));
+        $this->assertStringContainsString(gmdate('D, d M Y H:i', strtotime('+1 year')), $response->headers->get('Expires'));
         $this->assertEquals('max-age=31536000, public', $response->headers->get('Cache-Control'));
     }
 }