diff --git a/composer.json b/composer.json
index fe2bc0f..b643b0d 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
         }
     ],
     "require": {
-        "neos/flow": "~4.0 || ~5.0 || dev-master"
+        "neos/flow": "~4.0 || ~5.0 || ~6.0 || dev-master"
     },
     "autoload": {
         "psr-4": {