diff --git a/composer.json b/composer.json
index e3faef9..9e87dc1 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
         "php": ">=5.3.2"
     },
     "require-dev": {
-        "phpunit/phpunit": "~4.0"
+        "phpunit/phpunit": "~4.8.35"
     },
     "autoload": {
         "psr-0": {
diff --git a/tests/Valitron/BaseTestCase.php b/tests/Valitron/BaseTestCase.php
index fec8efc..ccfc736 100644
--- a/tests/Valitron/BaseTestCase.php
+++ b/tests/Valitron/BaseTestCase.php
@@ -1,6 +1,8 @@
 <?php
 
-class BaseTestCase extends \PHPUnit_Framework_TestCase
+use PHPUnit\Framework\TestCase;
+
+class BaseTestCase extends TestCase
 {
 	public function setUp()
 	{