README.md in gds-sso-4.0.0 vs README.md in gds-sso-5.0.0

@@ -37,16 +37,18 @@
 It should have the following fields:
     string   "name"
     string   "email"
     string   "uid"
     array    "permissions"
+    array    "organisations"
     boolean  "remotely_signed_out", :default => false
 
 You also need to include `GDS::SSO::ControllerMethods` in your ApplicationController
 
-For ActiveRecord, you probably want to declare permissions as "serialized" like this:
+For ActiveRecord, you probably want to declare permissions and organisations as "serialized" like this:
 
     serialize :permissions, Array
+    serialize :organisations, Array
 
 
 ## Use in development mode
 
 In development, you generally want to be able to run an application without needing to run your own SSO server to be running as well. GDS-SSO facilitates this by using a 'mock' mode in development. Mock mode loads an arbitrary user from the local application's user tables: