diff --git a/composer.json b/composer.json
index 7390a5018..a6a2f1d75 100644
--- a/composer.json
+++ b/composer.json
@@ -30,7 +30,7 @@
 
     "require-dev": {
         "symfony/process": "~2.5 || ^3.0 || ^4.0 || ^5.0",
-        "phpunit/phpunit": "^4.8.36 || ^6.3",
+        "phpunit/phpunit": "^4.8.36 || ^6.3 || ^8.0",
         "herrera-io/box": "~1.6.1"
     },