diff --git a/composer.json b/composer.json
index a16bece..2ac5974 100644
--- a/composer.json
+++ b/composer.json
@@ -22,11 +22,12 @@
         }
     ],
     "require": {
-        "laravel/framework": "~5.5"
+        "laravel/framework": "~5.5|^6.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^6.2|^7.0",
-        "orchestra/testbench": "~3.5.0|~3.6.0"
+        "phpunit/phpunit": "^6.2|^7.0|^8.0",
+        "orchestra/testbench": "~3.5.0|~3.6.0|~4.0.0",
+        "orchestra/database": "~3.5.0|~3.6.0|~4.0.0"
     },
     "autoload": {
         "psr-4": {
diff --git a/tests/TestCase.php b/tests/TestCase.php
index 9abd1fc..249f8b4 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -8,7 +8,7 @@
 
 abstract class TestCase extends Orchestra
 {
-    public function setUp()
+    public function setUp(): void
     {
         parent::setUp();