diff --git a/composer.json b/composer.json
index cb05c04..20493d0 100644
--- a/composer.json
+++ b/composer.json
@@ -19,6 +19,7 @@
     },
     "require-dev": {
         "ergebnis/composer-normalize": "^2.13.2",
+        "nikic/php-parser": "<5.0",
         "php-parallel-lint/php-parallel-lint": "^1.2.0",
         "phpstan/extension-installer": "^1.1",
         "phpstan/phpstan": "^1.3.0",