diff --git a/composer.json b/composer.json
index 2059280..fd588fa 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
         }
     ],
     "require": {
-        "neos/neos": "^8.3 || dev-master",
+        "neos/neos": "^8.3 || ^9.0 || dev-master",
         "guzzlehttp/psr7": "^1.4 || ^2.0"
     },
     "autoload": {