diff --git a/docs/v1/accounting/index.html b/docs/v1/accounting/index.html
index 65c8b328..80d8a607 100644
--- a/docs/v1/accounting/index.html
+++ b/docs/v1/accounting/index.html
@@ -4077,7 +4077,7 @@
     "Class" : {
       "type" : "string",
       "description" : "Organisation Classes describe which plan the Xero organisation is on (e.g. DEMO, TRIAL, PREMIUM)",
-      "enum" : [ "DEMO", "TRIAL", "STARTER", "STANDARD", "PREMIUM", "PREMIUM_20", "PREMIUM_50", "PREMIUM_100", "LEDGER", "GST_CASHBOOK", "NON_GST_CASHBOOK", "ULTIMATE", "LITE", "IGNITE", "GROW", "COMPREHENSIVE" ]
+      "enum" : [ "DEMO", "TRIAL", "STARTER", "STANDARD", "PREMIUM", "PREMIUM_20", "PREMIUM_50", "PREMIUM_100", "LEDGER", "GST_CASHBOOK", "NON_GST_CASHBOOK", "ULTIMATE", "LITE", "ULTIMATE_10", "ULTIMATE_20", "ULTIMATE_50", "ULTIMATE_100", "IGNITE", "GROW", "COMPREHENSIVE" ]
     },
     "Edition" : {
       "type" : "string",
diff --git a/xero_python/accounting/models/organisation.py b/xero_python/accounting/models/organisation.py
index d88f380a..bb67171f 100644
--- a/xero_python/accounting/models/organisation.py
+++ b/xero_python/accounting/models/organisation.py
@@ -981,6 +981,10 @@ def _class(self, _class):
             "NON_GST_CASHBOOK",
             "ULTIMATE",
             "LITE",
+            "ULTIMATE_10",
+            "ULTIMATE_20",
+            "ULTIMATE_50",
+            "ULTIMATE_100",
             "IGNITE",
             "GROW",
             "COMPREHENSIVE",