diff --git a/composer.json b/composer.json
index dc002b6f..49ee62e0 100644
--- a/composer.json
+++ b/composer.json
@@ -33,7 +33,7 @@
         "bamarni/composer-bin-plugin": "^1.4",
         "phpstan/phpstan": "^1.5.6",
         "phpstan/phpstan-doctrine": "1.4.0",
-        "phpstan/phpstan-phpunit": "1.3.16",
+        "phpstan/phpstan-phpunit": "1.4.0",
         "phpstan/phpstan-symfony": "1.4.0",
         "rector/rector": "1.0.5",
         "roave/security-advisories": "dev-master",