diff --git a/composer.json b/composer.json
index e44650c..77d76e0 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,8 @@
         }
     ],
     "require": {
-        "php": "^7.1"
+        "php": "^7.1",
+        "illuminate/support": "~5.6.0|~5.7.0|~5.8.0"
     },
     "require-dev": {
         "orchestra/testbench": "^3.6",
diff --git a/tests/TestCase.php b/tests/TestCase.php
index 5e04697..9b56a6c 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -9,7 +9,7 @@ use BeyondCode\Comments\CommentsServiceProvider;
 abstract class TestCase extends \Orchestra\Testbench\TestCase
 {
 
-    public function setUp()
+    public function setUp(): void
     {
         parent::setUp();
         $this->loadLaravelMigrations(['--database' => 'sqlite']);