diff --git a/composer.json b/composer.json
index 07c0a17..9fa0149 100644
--- a/composer.json
+++ b/composer.json
@@ -5,7 +5,7 @@
     "type": "library",
     "require": {
         "php": ">=5.3",
-        "nikic/php-parser": "*"
+        "nikic/php-parser": "<1"
     },
     "require-dev": {
         "phpunit/phpunit": "~4"