diff --git a/composer.json b/composer.json
index 940863b..81601fc 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
         "source": "https://github.com/sandstorm/UserManagement"
     },
     "require": {
-        "neos/flow": "^6.0 || ^7.0 || dev-master",
+        "neos/flow": "^6.0 || ^7.0 || ^8.0 || dev-master",
         "sandstorm/templatemailer": "^2.0.2"
     },
     "autoload": {