diff --git a/composer.json b/composer.json
index 9500219..8f5d667 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
     "license": "MIT",
     "homepage": "https://github.com/digicomp/DigiComp.Sequence",
     "require": {
-        "neos/flow": "~4.1|~5.3"
+        "neos/flow": "~4.1|~5.3|~6.3"
     },
     "require-dev": {
         "phpunit/phpunit": "3.7.*",
@@ -70,4 +70,4 @@
             "Neos.Flow-20180415105700"
         ]
     }
-}
\ No newline at end of file
+}