diff --git a/Gruntfile.coffee b/Gruntfile.coffee
index 91ebd3e..0f44d07 100644
--- a/Gruntfile.coffee
+++ b/Gruntfile.coffee
@@ -147,7 +147,7 @@ module.exports = ->
     desc = {}
     protocols =
       runtime: ['input', 'output']
-      graph: ['input']
+      graph: ['input', 'output']
       component: ['input', 'output']
       network: ['input', 'output']