diff --git a/composer.json b/composer.json
index 4077091..f23b608 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
     },
     "require-dev": {
         "composer/composer": "2.1.9",
-        "phpunit/phpunit": "9.5.10"
+        "phpunit/phpunit": "9.5.20"
     },
     "autoload": {
         "psr-4": {