diff --git a/composer.json b/composer.json
index e0fa9c2..8b65984 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
         "doctrine/annotations": "^1.2"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5.5",
+        "phpunit/phpunit": "^8.2",
         "onion/framework": "2.0",
         "doctrine/cache": "^1.6"
     },