diff --git a/composer.json b/composer.json
index 186c946..c378247 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
         "symfony/process": "^4.2"
     },
     "require-dev": {
-        "phpunit/phpunit": "8.3.4"
+        "phpunit/phpunit": "8.3.5"
     },
     "autoload": {
         "files": [