diff --git a/composer.json b/composer.json
index 274d4b3e..a668d55e 100644
--- a/composer.json
+++ b/composer.json
@@ -35,7 +35,7 @@
         "phpstan/phpstan-deprecation-rules": "^0.11",
         "phpstan/phpstan-phpunit": "^0.11",
         "phpstan/phpstan-strict-rules": "^0.11",
-        "phpunit/phpunit": "^8.2",
+        "phpunit/phpunit": "^8.3",
         "squizlabs/php_codesniffer": "^3.4",
         "twig/twig": "^2.11",
         "zendframework/zend-diactoros": "^2.1"