diff --git a/tests/ControllerTest.php b/tests/ControllerTest.php
index 7790625..3f1065b 100755
--- a/tests/ControllerTest.php
+++ b/tests/ControllerTest.php
@@ -19,7 +19,7 @@ class ControllerTest extends \PHPUnit\Framework\TestCase
 {
     protected ControllerInterface $controller;
 
-    protected function setUp()
+    protected function setUp(): void
     {
         $this->controller = new Controller();