diff --git a/composer.json b/composer.json
index aa7d61b..c4bedbd 100644
--- a/composer.json
+++ b/composer.json
@@ -10,15 +10,15 @@
         }
     ],
     "require": {
-        "php": ">=5.5.9",
-        "illuminate/support": "^5.1 || ^6.0",
-        "illuminate/filesystem": "^5.1 || ^6.0",
+        "php": "^7.1",
+        "illuminate/support": "^5.5 || ^6.0",
+        "illuminate/filesystem": "^5.5 || ^6.0",
         "doctrine/annotations": "~1.2",
         "phpdocumentor/reflection-docblock": "^3.1|^4.1"
     },
     "require-dev": {
         "squizlabs/php_codesniffer": "~2.0",
-        "phpunit/phpunit": "~4.0"
+        "phpunit/phpunit": "^4.8.35 || ^5.4.3 || ^6.5"
     },
     "autoload": {
         "psr-4": {
diff --git a/src/Section.php b/src/Section.php
index 4cda714..41c7c71 100644
--- a/src/Section.php
+++ b/src/Section.php
@@ -2,6 +2,7 @@
 
 namespace Dingo\Blueprint;
 
+use Illuminate\Support\Arr;
 use Illuminate\Support\Collection;
 
 abstract class Section
@@ -15,7 +16,7 @@ abstract class Section
      */
     protected function getAnnotationByType($type)
     {
-        return array_first($this->annotations, function ($key, $annotation) use ($type) {
+        return Arr::first($this->annotations, function ($key, $annotation) use ($type) {
             $type = sprintf('Dingo\\Blueprint\\Annotation\\%s', $type);
 
             return is_object($annotation) ? $annotation instanceof $type : $key instanceof $type;
diff --git a/tests/BlueprintTest.php b/tests/BlueprintTest.php
index 3569222..7381f65 100644
--- a/tests/BlueprintTest.php
+++ b/tests/BlueprintTest.php
@@ -3,12 +3,12 @@
 namespace Dingo\Blueprint\Tests;
 
 use Dingo\Blueprint\Blueprint;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 use Illuminate\Support\Collection;
 use Illuminate\Filesystem\Filesystem;
 use Doctrine\Common\Annotations\SimpleAnnotationReader;
 
-class BlueprintTest extends PHPUnit_Framework_TestCase
+class BlueprintTest extends TestCase
 {
     public function testGeneratingBlueprintForSingleResource()
     {
diff --git a/tests/LaravelIntegrationTest.php b/tests/LaravelIntegrationTest.php
index 0e4d3ca..57da07c 100644
--- a/tests/LaravelIntegrationTest.php
+++ b/tests/LaravelIntegrationTest.php
@@ -1,52 +1,13 @@
 <?php
 
-namespace {
-    $arrayFirstVersion = '5.2';
-}
-
 namespace Dingo\Blueprint {
 
-    use PHPUnit_Framework_TestCase;
     use Illuminate\Support\Collection;
     use Illuminate\Filesystem\Filesystem;
     use Doctrine\Common\Annotations\SimpleAnnotationReader;
+    use PHPUnit\Framework\TestCase;
 
-    function array_first($array, callable $callback = null, $default = null)
-    {
-        global $arrayFirstVersion;
-        switch ($arrayFirstVersion) {
-            case '5.2':
-                if (is_null($callback)) {
-                    return empty($array) ? value($default) : reset($array);
-                }
-                foreach ($array as $key => $value) {
-                    if (call_user_func($callback, $key, $value)) {
-                        return $value;
-                    }
-                }
-                break;
-            case '5.3':
-                if (is_null($callback)) {
-                    if (empty($array)) {
-                        return value($default);
-                    }
-
-                    foreach ($array as $item) {
-                        return $item;
-                    }
-                }
-                foreach ($array as $key => $value) {
-                    if (call_user_func($callback, $value, $key)) {
-                        return $value;
-                    }
-                }
-                break;
-        }
-
-        return value($default);
-    }
-
-    class LaravelIntegrationTest extends PHPUnit_Framework_TestCase
+    class LaravelIntegrationTest extends TestCase
     {
         protected $simpleExample = <<<'EOT'
 FORMAT: 1A
@@ -60,9 +21,6 @@ class LaravelIntegrationTest extends PHPUnit_Framework_TestCase
 
         public function testGetAnnotationByTypeInLaravel52x()
         {
-            global $arrayFirstVersion;
-            $arrayFirstVersion = '5.2';
-
             $resources = new Collection([new Tests\Stubs\ActivityController]);
 
             $blueprint = new Blueprint(new SimpleAnnotationReader, new Filesystem);
@@ -72,9 +30,6 @@ public function testGetAnnotationByTypeInLaravel52x()
 
         public function testGetAnnotationByTypeInLaravel53x()
         {
-            global $arrayFirstVersion;
-            $arrayFirstVersion = '5.3';
-
             $resources = new Collection([new Tests\Stubs\ActivityController]);
 
             $blueprint = new Blueprint(new SimpleAnnotationReader, new Filesystem);