diff --git a/.travis.yml b/.travis.yml
index 677e4b5..2f54e92 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,41 +5,33 @@ sudo: false
 dist: trusty
 
 php:
-    - 5.5
-    - 7.0
     - 7.1
     - 7.2
+    - 7.3
+    - 7.4
     - nightly
 
 env:
-    - SYMFONY_VERSION="2.7.*"
-    - SYMFONY_VERSION="2.8.*"
-    - SYMFONY_VERSION="3.4.*"
-    - SYMFONY_VERSION="4.0.*"
+    - SYMFONY_VERSION="4.4.*"
+    - SYMFONY_VERSION="5.0.*"
 
 matrix:
     fast_finish: true
     exclude:
-        - php: 5.5
-          env: SYMFONY_VERSION="4.0.*"
-        - php: 5.5
-          env: SYMFONY_VERSION="dev-master"
-        - php: 7.0
-          env: SYMFONY_VERSION="4.0.*"
-        - php: 7.0
-          env: SYMFONY_VERSION="dev-master"
+        - php: 7.1
+          env: SYMFONY_VERSION="5.0.*"
     allow_failures:
         - php: nightly
 
 before_script:
     - composer require symfony/symfony:${SYMFONY_VERSION} --prefer-dist --no-interaction --no-progress
     - mkdir -p build/logs
-    - if [ "${TRAVIS_PHP_VERSION}" == '7.1' ] && [ "${SYMFONY_VERSION}" == '3.4.*' ]; then composer require doctrine/orm doctrine/doctrine-bundle doctrine/mongodb-odm-bundle alcaeus/mongo-php-adapter --ignore-platform-reqs --no-interaction --no-progress; fi;
+    - if [ "${TRAVIS_PHP_VERSION}" == '7.1' ] && [ "${SYMFONY_VERSION}" == '4.4.*' ]; then composer require doctrine/orm doctrine/doctrine-bundle doctrine/mongodb-odm-bundle alcaeus/mongo-php-adapter --ignore-platform-reqs --no-interaction --no-progress; fi;
 
 script:
-    - if [ "${TRAVIS_PHP_VERSION}" != '7.1' ] || [ "${SYMFONY_VERSION}" != '3.4.*' ]; then vendor/bin/phpunit -v; fi;
-    - if [ "${TRAVIS_PHP_VERSION}" == '7.1' ] && [ "${SYMFONY_VERSION}" == '3.4.*' ]; then vendor/bin/phpunit -v --coverage-clover build/logs/clover.xml; fi;
-    - if [ "${TRAVIS_PHP_VERSION}" == '7.1' ] && [ "${SYMFONY_VERSION}" == '3.4.*' ]; then travis_retry wget -q https://github.com/satooshi/php-coveralls/releases/download/v1.0.1/coveralls.phar && travis_retry php coveralls.phar -v; fi;
+    - if [ "${TRAVIS_PHP_VERSION}" != '7.1' ] || [ "${SYMFONY_VERSION}" != '4.4.*' ]; then vendor/bin/phpunit -v; fi;
+    - if [ "${TRAVIS_PHP_VERSION}" == '7.1' ] && [ "${SYMFONY_VERSION}" == '4.4.*' ]; then vendor/bin/phpunit -v --coverage-clover build/logs/clover.xml; fi;
+    - if [ "${TRAVIS_PHP_VERSION}" == '7.1' ] && [ "${SYMFONY_VERSION}" == '4.4.*' ]; then travis_retry wget -q https://github.com/satooshi/php-coveralls/releases/download/v1.0.1/coveralls.phar && travis_retry php coveralls.phar -v; fi;
 
 notifications:
     email:
diff --git a/composer.json b/composer.json
index 9a825a3..361abce 100644
--- a/composer.json
+++ b/composer.json
@@ -18,16 +18,18 @@
         }
     ],
     "require": {
-        "php": ">=5.5.9",
-        "symfony/symfony": "~2.7|~3.0|~4.0",
+        "php": ">=7.1.3",
+        "ext-gd": "*",
+        "ext-exif": "*",
+        "symfony/symfony": "4.4.*|5.0.*",
         "intervention/image": "^2.3",
-        "twig/twig": "^1.28|^2.0",
+        "twig/twig": "^2.0",
         "sybio/gif-frame-extractor": "^1.0",
         "sybio/gif-creator": "^1.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^4.0|^5.0",
-        "matthiasnoback/symfony-dependency-injection-test": "^1.0"
+        "phpunit/phpunit": "^7.0",
+        "matthiasnoback/symfony-dependency-injection-test": "^3.0|^4.0"
     },
     "autoload": {
         "psr-4": {
diff --git a/tests/Tests/.gitkeep b/tests/Tests/.gitkeep
deleted file mode 100644
index e69de29..0000000
diff --git a/tests/Tests/Controller/ImageControllerTest.php b/tests/Tests/Controller/ImageControllerTest.php
index 32d8a84..af3b109 100644
--- a/tests/Tests/Controller/ImageControllerTest.php
+++ b/tests/Tests/Controller/ImageControllerTest.php
@@ -15,6 +15,7 @@
 use IngaLabs\Bundle\ImageBundle\ImageManager;
 use IngaLabs\Bundle\ImageBundle\Model\Image;
 use IngaLabs\Bundle\ImageBundle\Tests\ExceptionWrapperTestCaseTrait;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
 /**
@@ -22,7 +23,7 @@
  *
  * @author Antal Áron <antalaron@antalaron.hu>
  */
-class ImageControllerTest extends \PHPUnit_Framework_TestCase
+class ImageControllerTest extends TestCase
 {
     use ExceptionWrapperTestCaseTrait;
 
diff --git a/tests/Tests/DependencyInjection/ConfigurationTest.php b/tests/Tests/DependencyInjection/ConfigurationTest.php
index 91ecf75..3111c4c 100644
--- a/tests/Tests/DependencyInjection/ConfigurationTest.php
+++ b/tests/Tests/DependencyInjection/ConfigurationTest.php
@@ -11,13 +11,14 @@
 
 use IngaLabs\Bundle\ImageBundle\DependencyInjection\Configuration;
 use Matthias\SymfonyConfigTest\PhpUnit\ConfigurationTestCaseTrait;
+use PHPUnit\Framework\TestCase;
 
 /**
  * ConfigurationTest.
  *
  * @author Antal Áron <antalaron@antalaron.hu>
  */
-class ConfigurationTest extends \PHPUnit_Framework_TestCase
+class ConfigurationTest extends TestCase
 {
     use ConfigurationTestCaseTrait;
 
diff --git a/tests/Tests/Helper/GifImageTest.php b/tests/Tests/Helper/GifImageTest.php
index 0181cb9..d304a77 100644
--- a/tests/Tests/Helper/GifImageTest.php
+++ b/tests/Tests/Helper/GifImageTest.php
@@ -10,13 +10,14 @@
 namespace IngaLabs\Bundle\ImageBundle\Tests\Helper;
 
 use IngaLabs\Bundle\ImageBundle\Helper\GifImage;
+use PHPUnit\Framework\TestCase;
 
 /**
  * GifImageTest.
  *
  * @author Antal Áron <antalaron@antalaron.hu>
  */
-class GifImageTest extends \PHPUnit_Framework_TestCase
+class GifImageTest extends TestCase
 {
     /**
      * @var GifImage
diff --git a/tests/Tests/ImageManagerTest.php b/tests/Tests/ImageManagerTest.php
index f7839e6..93aec58 100644
--- a/tests/Tests/ImageManagerTest.php
+++ b/tests/Tests/ImageManagerTest.php
@@ -23,6 +23,7 @@
 use IngaLabs\Bundle\ImageBundle\Repository\SizeRepositoryInterface;
 use Intervention\Image\Image as InventionImage;
 use Intervention\Image\ImageManager as InventionManager;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\BinaryFileResponse;
 use Symfony\Component\HttpFoundation\File\Exception\FileNotFoundException;
 use Symfony\Component\HttpFoundation\File\File;
@@ -34,7 +35,7 @@
  *
  * @author Antal Áron <antalaron@antalaron.hu>
  */
-class ImageManagerTest extends \PHPUnit_Framework_TestCase
+class ImageManagerTest extends TestCase
 {
     use ExceptionWrapperTestCaseTrait;
 
diff --git a/tests/Tests/IngaLabsImageBundleTest.php b/tests/Tests/IngaLabsImageBundleTest.php
index 830eec5..2828edd 100644
--- a/tests/Tests/IngaLabsImageBundleTest.php
+++ b/tests/Tests/IngaLabsImageBundleTest.php
@@ -15,6 +15,7 @@
 use IngaLabs\Bundle\ImageBundle\DependencyInjection\Compiler\ConfigPass;
 use IngaLabs\Bundle\ImageBundle\DependencyInjection\IngaLabsImageExtension;
 use IngaLabs\Bundle\ImageBundle\IngaLabsImageBundle;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
 /**
@@ -22,7 +23,7 @@
  *
  * @author Antal Áron <antalaron@antalaron.hu>
  */
-class IngaLabsImageBundleTest extends \PHPUnit_Framework_TestCase
+class IngaLabsImageBundleTest extends TestCase
 {
     public function testConfigCompilerPass()
     {
diff --git a/tests/Tests/Model/AspectTest.php b/tests/Tests/Model/AspectTest.php
index 4bd1499..3b847e8 100644
--- a/tests/Tests/Model/AspectTest.php
+++ b/tests/Tests/Model/AspectTest.php
@@ -10,8 +10,9 @@
 namespace IngaLabs\Bundle\ImageBundle\Tests\Model;
 
 use IngaLabs\Bundle\ImageBundle\Model\Aspect;
+use PHPUnit\Framework\TestCase;
 
-class AspectTest extends \PHPUnit_Framework_TestCase
+class AspectTest extends TestCase
 {
     /**
      * @var Aspect
diff --git a/tests/Tests/Model/ImageTest.php b/tests/Tests/Model/ImageTest.php
index 6f9295a..004bcaf 100644
--- a/tests/Tests/Model/ImageTest.php
+++ b/tests/Tests/Model/ImageTest.php
@@ -10,8 +10,9 @@
 namespace IngaLabs\Bundle\ImageBundle\Tests\Model;
 
 use IngaLabs\Bundle\ImageBundle\Model\Image;
+use PHPUnit\Framework\TestCase;
 
-class ImageTest extends \PHPUnit_Framework_TestCase
+class ImageTest extends TestCase
 {
     /**
      * @var Image
diff --git a/tests/Tests/Model/SizeTest.php b/tests/Tests/Model/SizeTest.php
index fd99669..dfc735c 100644
--- a/tests/Tests/Model/SizeTest.php
+++ b/tests/Tests/Model/SizeTest.php
@@ -10,8 +10,9 @@
 namespace IngaLabs\Bundle\ImageBundle\Tests\Model;
 
 use IngaLabs\Bundle\ImageBundle\Model\Size;
+use PHPUnit\Framework\TestCase;
 
-class SizeTest extends \PHPUnit_Framework_TestCase
+class SizeTest extends TestCase
 {
     /**
      * @var Size
diff --git a/tests/Tests/Repository/ImageRepositoryTraitTest.php b/tests/Tests/Repository/ImageRepositoryTraitTest.php
index c41b311..611c3e4 100644
--- a/tests/Tests/Repository/ImageRepositoryTraitTest.php
+++ b/tests/Tests/Repository/ImageRepositoryTraitTest.php
@@ -11,13 +11,14 @@
 
 use Doctrine\Common\Persistence\ObjectRepository;
 use IngaLabs\Bundle\ImageBundle\Repository\ImageRepositoryTrait;
+use PHPUnit\Framework\TestCase;
 
 /**
  * ImageRepositoryTraitTest.
  *
  * @author Antal Áron <antalaron@antalaron.hu>
  */
-class ImageRepositoryTraitTest extends \PHPUnit_Framework_TestCase
+class ImageRepositoryTraitTest extends TestCase
 {
     public function testFindOneByHashCallsTheAbstractMethod()
     {
diff --git a/tests/Tests/Routing/Loader/ImageLoaderTest.php b/tests/Tests/Routing/Loader/ImageLoaderTest.php
index 3fcdaf7..f8b28ab 100644
--- a/tests/Tests/Routing/Loader/ImageLoaderTest.php
+++ b/tests/Tests/Routing/Loader/ImageLoaderTest.php
@@ -12,13 +12,14 @@
 use IngaLabs\Bundle\ImageBundle\Exception\LoaderException;
 use IngaLabs\Bundle\ImageBundle\Routing\Loader\ImageLoader;
 use IngaLabs\Bundle\ImageBundle\Tests\ExceptionWrapperTestCaseTrait;
+use PHPUnit\Framework\TestCase;
 
 /**
  * ImageLoaderTest.
  *
  * @author Antal Áron <antalaron@antalaron.hu>
  */
-class ImageLoaderTest extends \PHPUnit_Framework_TestCase
+class ImageLoaderTest extends TestCase
 {
     use ExceptionWrapperTestCaseTrait;
 
diff --git a/tests/Tests/Twig/ImageExtensionTest.php b/tests/Tests/Twig/ImageExtensionTest.php
index 397cfd1..81092b4 100644
--- a/tests/Tests/Twig/ImageExtensionTest.php
+++ b/tests/Tests/Twig/ImageExtensionTest.php
@@ -13,13 +13,16 @@
 use IngaLabs\Bundle\ImageBundle\ImageManager;
 use IngaLabs\Bundle\ImageBundle\Model\Image;
 use IngaLabs\Bundle\ImageBundle\Twig\ImageExtension;
+use PHPUnit\Framework\TestCase;
+use Twig\Environment;
+use Twig\Loader\ArrayLoader;
 
 /**
  * ImageExtensionTest.
  *
  * @author Antal Áron <antalaron@antalaron.hu>
  */
-class ImageExtensionTest extends \PHPUnit_Framework_TestCase
+class ImageExtensionTest extends TestCase
 {
     public function testImage()
     {
@@ -31,10 +34,10 @@ public function testImage()
         $managerRegistry = $this->getManagerRegistryMock();
         $imageManager = new ImageManager($managerRegistry, ['prefix' => '/images']);
 
-        $loader = new \Twig_Loader_Array([
+        $loader = new ArrayLoader([
             'index.html' => '{{ image(image) }}',
         ]);
-        $twig = new \Twig_Environment($loader, ['debug' => false, 'cache' => false, 'autoescape' => 'html', 'optimizations' => 0]);
+        $twig = new Environment($loader, ['debug' => false, 'cache' => false, 'autoescape' => 'html', 'optimizations' => 0]);
         $twig->addExtension(new ImageExtension($imageManager));
 
         $this->assertSame('/images/01/01234567/01234567890123456789012345678901_or_or.jpg', $twig->render('index.html', ['image' => $image]));
@@ -51,10 +54,10 @@ public function testImageFull()
         $managerRegistry = $this->getManagerRegistryMock();
         $imageManager = new ImageManager($managerRegistry, ['prefix' => '/images']);
 
-        $loader = new \Twig_Loader_Array([
+        $loader = new ArrayLoader([
             'index.html' => '{{ image(image, {\'size\': \'sm\', \'aspect\': \'1x1\', \'show_last_modified\': true}) }}',
         ]);
-        $twig = new \Twig_Environment($loader, ['debug' => false, 'cache' => false, 'autoescape' => 'html', 'optimizations' => 0]);
+        $twig = new Environment($loader, ['debug' => false, 'cache' => false, 'autoescape' => 'html', 'optimizations' => 0]);
         $twig->addExtension(new ImageExtension($imageManager));
 
         $this->assertSame('/images/01/01234567/01234567890123456789012345678901_sm_1x1.jpg?timestamp=522538840', $twig->render('index.html', ['image' => $image]));
@@ -67,10 +70,10 @@ public function testImageNull()
         $managerRegistry = $this->getManagerRegistryMock();
         $imageManager = new ImageManager($managerRegistry, ['prefix' => '/images']);
 
-        $loader = new \Twig_Loader_Array([
+        $loader = new ArrayLoader([
             'index.html' => '{{ image(image) }}',
         ]);
-        $twig = new \Twig_Environment($loader, ['debug' => false, 'cache' => false, 'autoescape' => 'html', 'optimizations' => 0]);
+        $twig = new Environment($loader, ['debug' => false, 'cache' => false, 'autoescape' => 'html', 'optimizations' => 0]);
         $twig->addExtension(new ImageExtension($imageManager));
 
         $this->assertSame('', $twig->render('index.html', ['image' => $image]));