diff --git a/composer.json b/composer.json
index 59318cd..eef3b0e 100755
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,7 @@
         "phpmd/phpmd": "2.7.0",
         "phpmetrics/phpmetrics": "dev-master@dev",
         "phpstan/phpstan": "0.11.12",
-        "phpunit/phpunit": "8.3.2",
+        "phpunit/phpunit": "8.4.3",
         "squizlabs/php_codesniffer": "3.4.2",
         "victorjonsson/markdowndocs": "1.3.8"
     },