diff --git a/docs/v1/accounting/index.html b/docs/v1/accounting/index.html
index 2c6ddb94..a5e158a8 100644
--- a/docs/v1/accounting/index.html
+++ b/docs/v1/accounting/index.html
@@ -4193,7 +4193,7 @@
     "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", "ULTIMATE_10", "ULTIMATE_20", "ULTIMATE_50", "ULTIMATE_100", "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", "SIMPLE" ]
     },
     "Edition" : {
       "type" : "string",
@@ -6339,7 +6339,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="Accounting"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="Accounting"><strong>VSN: </strong>8.0.0</li>
+              <li class="nav-header" data-group="Accounting"><strong>VSN: </strong>8.1.0</li>
               <li class="nav-header" data-group="Accounting"><a href="#api-Accounting">Methods</a></li>
               <li data-group="Accounting" data-name="createAccount" class="">
                 <a href="#api-Accounting-createAccount">createAccount</a>
diff --git a/docs/v1/appstore/index.html b/docs/v1/appstore/index.html
index 93515fbc..62e29247 100644
--- a/docs/v1/appstore/index.html
+++ b/docs/v1/appstore/index.html
@@ -1241,7 +1241,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="AppStore"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="AppStore"><strong>VSN: </strong>8.0.0</li>
+              <li class="nav-header" data-group="AppStore"><strong>VSN: </strong>8.1.0</li>
               <li class="nav-header" data-group="AppStore"><a href="#api-AppStore">Methods</a></li>
               <li data-group="AppStore" data-name="getSubscription" class="">
                 <a href="#api-AppStore-getSubscription">getSubscription</a>
diff --git a/docs/v1/assets/index.html b/docs/v1/assets/index.html
index 95421077..65ff8f58 100644
--- a/docs/v1/assets/index.html
+++ b/docs/v1/assets/index.html
@@ -1392,7 +1392,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="Asset"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="Asset"><strong>VSN: </strong>8.0.0</li>
+              <li class="nav-header" data-group="Asset"><strong>VSN: </strong>8.1.0</li>
               <li class="nav-header" data-group="Asset"><a href="#api-Asset">Methods</a></li>
               <li data-group="Asset" data-name="createAsset" class="">
                 <a href="#api-Asset-createAsset">createAsset</a>
diff --git a/docs/v1/files/index.html b/docs/v1/files/index.html
index 44ce279a..d2f2ac2f 100644
--- a/docs/v1/files/index.html
+++ b/docs/v1/files/index.html
@@ -1170,7 +1170,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="Files"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="Files"><strong>VSN: </strong>8.0.0</li>
+              <li class="nav-header" data-group="Files"><strong>VSN: </strong>8.1.0</li>
               <li class="nav-header" data-group="Files"><a href="#api-Files">Methods</a></li>
               <li data-group="Files" data-name="createFileAssociation" class="">
                 <a href="#api-Files-createFileAssociation">createFileAssociation</a>
diff --git a/docs/v1/finance/index.html b/docs/v1/finance/index.html
index 8bb14683..8c2d926e 100644
--- a/docs/v1/finance/index.html
+++ b/docs/v1/finance/index.html
@@ -2716,7 +2716,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="Finance"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="Finance"><strong>VSN: </strong>8.0.0</li>
+              <li class="nav-header" data-group="Finance"><strong>VSN: </strong>8.1.0</li>
               <li class="nav-header" data-group="Finance"><a href="#api-Finance">Methods</a></li>
               <li data-group="Finance" data-name="getAccountingActivityAccountUsage" class="">
                 <a href="#api-Finance-getAccountingActivityAccountUsage">getAccountingActivityAccountUsage</a>
diff --git a/docs/v1/payroll-au/index.html b/docs/v1/payroll-au/index.html
index a8864c16..4b959733 100644
--- a/docs/v1/payroll-au/index.html
+++ b/docs/v1/payroll-au/index.html
@@ -3412,7 +3412,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="PayrollAu"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="PayrollAu"><strong>VSN: </strong>8.0.0</li>
+              <li class="nav-header" data-group="PayrollAu"><strong>VSN: </strong>8.1.0</li>
               <li class="nav-header" data-group="PayrollAu"><a href="#api-PayrollAu">Methods</a></li>
               <li data-group="PayrollAu" data-name="approveLeaveApplication" class="">
                 <a href="#api-PayrollAu-approveLeaveApplication">approveLeaveApplication</a>
diff --git a/docs/v1/payroll-nz/index.html b/docs/v1/payroll-nz/index.html
index f20c03e6..18d98093 100644
--- a/docs/v1/payroll-nz/index.html
+++ b/docs/v1/payroll-nz/index.html
@@ -4087,7 +4087,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="PayrollNz"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="PayrollNz"><strong>VSN: </strong>8.0.0</li>
+              <li class="nav-header" data-group="PayrollNz"><strong>VSN: </strong>8.1.0</li>
               <li class="nav-header" data-group="PayrollNz"><a href="#api-PayrollNz">Methods</a></li>
               <li data-group="PayrollNz" data-name="approveTimesheet" class="">
                 <a href="#api-PayrollNz-approveTimesheet">approveTimesheet</a>
diff --git a/docs/v1/payroll-uk/index.html b/docs/v1/payroll-uk/index.html
index 380facfc..417d72a3 100644
--- a/docs/v1/payroll-uk/index.html
+++ b/docs/v1/payroll-uk/index.html
@@ -2562,7 +2562,7 @@
   "type" : "string",
   "description" : "The employee's NI Category letter.",
   "example" : "I",
-  "enum" : [ "A", "B", "C", "D", "E", "F", "H", "I", "J", "K", "L", "M", "N", "S", "V", "X", "Z" ]
+  "enum" : [ "A", "B", "C", "F", "H", "I", "J", "L", "M", "S", "V", "X", "Z", "D", "E", "K", "N" ]
 };
       defs["NICategory_oneOf"] = {
   "title" : "",
@@ -3600,7 +3600,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="PayrollUk"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="PayrollUk"><strong>VSN: </strong>8.0.0</li>
+              <li class="nav-header" data-group="PayrollUk"><strong>VSN: </strong>8.1.0</li>
               <li class="nav-header" data-group="PayrollUk"><a href="#api-PayrollUk">Methods</a></li>
               <li data-group="PayrollUk" data-name="approveTimesheet" class="">
                 <a href="#api-PayrollUk-approveTimesheet">approveTimesheet</a>
diff --git a/docs/v1/projects/index.html b/docs/v1/projects/index.html
index 493831ed..03ba1d1f 100644
--- a/docs/v1/projects/index.html
+++ b/docs/v1/projects/index.html
@@ -1462,7 +1462,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="Project"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="Project"><strong>VSN: </strong>8.0.0</li>
+              <li class="nav-header" data-group="Project"><strong>VSN: </strong>8.1.0</li>
               <li class="nav-header" data-group="Project"><a href="#api-Project">Methods</a></li>
               <li data-group="Project" data-name="createProject" class="">
                 <a href="#api-Project-createProject">createProject</a>
diff --git a/setup.py b/setup.py
index 32e487f1..fc0aa3a0 100644
--- a/setup.py
+++ b/setup.py
@@ -48,5 +48,5 @@ def read_file(filename):
     keywords="xero python sdk API oAuth",
     name="xero_python",
     packages=find_packages(include=["xero_python", "xero_python.*"]),
-    version="8.0.0",
+    version="8.1.0",
 )
diff --git a/xero_python/__init__.py b/xero_python/__init__.py
index cbda980b..b7d82f98 100644
--- a/xero_python/__init__.py
+++ b/xero_python/__init__.py
@@ -2,4 +2,4 @@
 
 __author__ = """Xero Developer API"""
 __email__ = "api@xero.com"
-__version__ = "8.0.0"
+__version__ = "8.1.0"
diff --git a/xero_python/accounting/api/accounting_api.py b/xero_python/accounting/api/accounting_api.py
index a38f2a49..03550422 100644
--- a/xero_python/accounting/api/accounting_api.py
+++ b/xero_python/accounting/api/accounting_api.py
@@ -21,7 +21,7 @@
 """
 
 """
-    OpenAPI spec version: 8.0.0
+    OpenAPI spec version: 8.1.0
 """
 
 
diff --git a/xero_python/accounting/models/organisation.py b/xero_python/accounting/models/organisation.py
index bb67171f..8e16dc57 100644
--- a/xero_python/accounting/models/organisation.py
+++ b/xero_python/accounting/models/organisation.py
@@ -988,6 +988,7 @@ def _class(self, _class):
             "IGNITE",
             "GROW",
             "COMPREHENSIVE",
+            "SIMPLE",
             "None",
         ]  # noqa: E501
 
diff --git a/xero_python/appstore/api/app_store_api.py b/xero_python/appstore/api/app_store_api.py
index 222f2489..3ac3a104 100644
--- a/xero_python/appstore/api/app_store_api.py
+++ b/xero_python/appstore/api/app_store_api.py
@@ -21,7 +21,7 @@
 """
 
 """
-    OpenAPI spec version: 8.0.0
+    OpenAPI spec version: 8.1.0
 """
 
 
diff --git a/xero_python/assets/api/asset_api.py b/xero_python/assets/api/asset_api.py
index 84be1132..4dfaa069 100644
--- a/xero_python/assets/api/asset_api.py
+++ b/xero_python/assets/api/asset_api.py
@@ -21,7 +21,7 @@
 """
 
 """
-    OpenAPI spec version: 8.0.0
+    OpenAPI spec version: 8.1.0
 """
 
 
diff --git a/xero_python/docs/README.md b/xero_python/docs/README.md
index 5315c2c4..3fed1186 100644
--- a/xero_python/docs/README.md
+++ b/xero_python/docs/README.md
@@ -3,8 +3,8 @@ These endpoints are related to managing authentication tokens and identity for X
 
 The `xero_python` package is automatically generated by the [XeroAPI SDK 2.0 Codegen](https://github.com/xero-github/xeroapi-sdk-codegen) project:
 
-- API version: 8.0.0
-- Package version: 8.0.0
+- API version: 8.1.0
+- Package version: 8.1.0
 - Build package: org.openapitools.codegen.languages.PythonClientCodegen
 For more information, please visit [https://developer.xero.com](https://developer.xero.com)
 
diff --git a/xero_python/file/api/files_api.py b/xero_python/file/api/files_api.py
index b6fb7055..c03c5846 100644
--- a/xero_python/file/api/files_api.py
+++ b/xero_python/file/api/files_api.py
@@ -21,7 +21,7 @@
 """
 
 """
-    OpenAPI spec version: 8.0.0
+    OpenAPI spec version: 8.1.0
 """
 
 
diff --git a/xero_python/finance/api/finance_api.py b/xero_python/finance/api/finance_api.py
index 860082cb..a28038d6 100644
--- a/xero_python/finance/api/finance_api.py
+++ b/xero_python/finance/api/finance_api.py
@@ -21,7 +21,7 @@
 """
 
 """
-    OpenAPI spec version: 8.0.0
+    OpenAPI spec version: 8.1.0
 """
 
 
diff --git a/xero_python/identity/api/identity_api.py b/xero_python/identity/api/identity_api.py
index 4582ff1b..edeed42d 100644
--- a/xero_python/identity/api/identity_api.py
+++ b/xero_python/identity/api/identity_api.py
@@ -21,7 +21,7 @@
 """
 
 """
-    OpenAPI spec version: 8.0.0
+    OpenAPI spec version: 8.1.0
 """
 
 
diff --git a/xero_python/payrollau/api/payroll_au_api.py b/xero_python/payrollau/api/payroll_au_api.py
index d015061b..399fb5d6 100644
--- a/xero_python/payrollau/api/payroll_au_api.py
+++ b/xero_python/payrollau/api/payroll_au_api.py
@@ -21,7 +21,7 @@
 """
 
 """
-    OpenAPI spec version: 8.0.0
+    OpenAPI spec version: 8.1.0
 """
 
 
diff --git a/xero_python/payrollnz/api/payroll_nz_api.py b/xero_python/payrollnz/api/payroll_nz_api.py
index 18289436..cc28fe25 100644
--- a/xero_python/payrollnz/api/payroll_nz_api.py
+++ b/xero_python/payrollnz/api/payroll_nz_api.py
@@ -21,7 +21,7 @@
 """
 
 """
-    OpenAPI spec version: 8.0.0
+    OpenAPI spec version: 8.1.0
 """
 
 
diff --git a/xero_python/payrolluk/api/payroll_uk_api.py b/xero_python/payrolluk/api/payroll_uk_api.py
index 358c5345..32792a56 100644
--- a/xero_python/payrolluk/api/payroll_uk_api.py
+++ b/xero_python/payrolluk/api/payroll_uk_api.py
@@ -21,7 +21,7 @@
 """
 
 """
-    OpenAPI spec version: 8.0.0
+    OpenAPI spec version: 8.1.0
 """
 
 
diff --git a/xero_python/project/api/project_api.py b/xero_python/project/api/project_api.py
index 518619a8..6abb7ead 100644
--- a/xero_python/project/api/project_api.py
+++ b/xero_python/project/api/project_api.py
@@ -21,7 +21,7 @@
 """
 
 """
-    OpenAPI spec version: 8.0.0
+    OpenAPI spec version: 8.1.0
 """