diff --git a/composer.json b/composer.json
index 855da83..fc65c7b 100644
--- a/composer.json
+++ b/composer.json
@@ -5,7 +5,7 @@
     "license": "MIT",
     "require": {
         "php": "^7.4 || ^8.0",
-        "neos/flow": "^6.3 || ^7.0 || ^8.0 || dev-master",
+        "neos/flow": "^6.3 || ^7.0 || ^8.0 || ^9.0",
         "neos/cache": "*"
     },
     "autoload": {