diff --git a/composer.json b/composer.json
index 50df782..b1dd42c 100644
--- a/composer.json
+++ b/composer.json
@@ -29,7 +29,7 @@
     "bin/teensyphp"
   ],
   "require-dev": {
-    "phpunit/phpunit": "12.5.4"
+    "phpunit/phpunit": "12.5.8"
   },
   "scripts": {
     "test": "./vendor/bin/phpunit",