diff --git a/composer.json b/composer.json
index 7ca6d0c..fd0df87 100644
--- a/composer.json
+++ b/composer.json
@@ -15,10 +15,10 @@
         "php": "^7.3 || ^8.0",
         "ext-openssl": "*",
         "ext-tokenizer": "*",
-        "phpunit/phpunit": "^9.5",
         "nikic/php-parser": "^4.10"
     },
     "require-dev": {
+        "phpunit/phpunit": "^9.5",
         "bamarni/composer-bin-plugin": "^1.4",
         "kenjis/phpunit-helper": "^1.1"
     },