diff --git a/composer.json b/composer.json
index afde628..179da22 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
         "php": "^7.1"
     },
     "require-dev": {
-        "phpunit/phpunit": "7.5.1"
+        "phpunit/phpunit": "7.5.4"
     },
     "autoload": {
         "files": [