diff --git a/composer.json b/composer.json
index f566721..2a44022 100644
--- a/composer.json
+++ b/composer.json
@@ -31,7 +31,7 @@
 	},
 	"require-dev": {
 		"donatj/mddoc": "^0.14.1",
-		"phpunit/phpunit": "~9|~11"
+		"phpunit/phpunit": "^13.4.5"
 	},
 	"autoload"   : {
 		"files": ["src/array.php"]