diff --git a/composer.json b/composer.json
index d55004c..3314932 100644
--- a/composer.json
+++ b/composer.json
@@ -5,7 +5,7 @@
     "license": "MIT",
     "require": {
         "php": "^7.1",
-        "neos/neos": "^3.3.2"
+        "neos/neos": "^3.3.2 || ^4.0"
     },
     "autoload": {
         "psr-4": {