diff --git a/xero-app-store.yaml b/xero-app-store.yaml
index 145f67d0d..b97164f92 100644
--- a/xero-app-store.yaml
+++ b/xero-app-store.yaml
@@ -1,6 +1,6 @@
 openapi: 3.0.0
 info:
-  version: "3.0.3"
+  version: "4.0.0"
   title: Xero AppStore API
   description: These endpoints are for Xero Partners to interact with the App Store Billing platform
   termsOfService: "https://developer.xero.com/xero-developer-platform-terms-conditions/"
diff --git a/xero-finance.yaml b/xero-finance.yaml
index bcdca34f2..70d4e4b84 100644
--- a/xero-finance.yaml
+++ b/xero-finance.yaml
@@ -1,6 +1,6 @@
 openapi: 3.0.0
 info:
-  version: "3.0.3"
+  version: "4.0.0"
   title: Xero Finance API
   description: The Finance API is a collection of endpoints which customers can use in the course of a loan application, which may assist lenders to gain the confidence they need to provide capital.
   termsOfService: "https://developer.xero.com/xero-developer-platform-terms-conditions/"
diff --git a/xero-identity.yaml b/xero-identity.yaml
index d4b39895d..42d2c8fa8 100644
--- a/xero-identity.yaml
+++ b/xero-identity.yaml
@@ -1,6 +1,6 @@
 openapi: 3.0.0
 info:
-  version: "3.0.3"
+  version: "4.0.0"
   title: Xero OAuth 2 Identity Service API
   description: These endpoints are related to managing authentication tokens and identity for Xero API
   termsOfService: "https://developer.xero.com/xero-developer-platform-terms-conditions/"
diff --git a/xero-payroll-au.yaml b/xero-payroll-au.yaml
index 53c1dc5ee..39c72ba7f 100644
--- a/xero-payroll-au.yaml
+++ b/xero-payroll-au.yaml
@@ -1,6 +1,6 @@
 openapi: 3.0.0
 info:
-  version: "3.0.3"
+  version: "4.0.0"
   title: 'Xero Payroll AU API'
   description: 'This is the Xero Payroll API for orgs in Australia region.'
   termsOfService: "https://developer.xero.com/xero-developer-platform-terms-conditions/"
diff --git a/xero-payroll-nz.yaml b/xero-payroll-nz.yaml
index cad454c59..11bab4461 100644
--- a/xero-payroll-nz.yaml
+++ b/xero-payroll-nz.yaml
@@ -1,6 +1,6 @@
 openapi: 3.0.
 info:
-  version: "3.0.3"
+  version: "4.0.0"
   title: 'Xero Payroll NZ'
   description: 'This is the Xero Payroll API for orgs in the NZ region.'
   termsOfService: "https://developer.xero.com/xero-developer-platform-terms-conditions/"
diff --git a/xero-payroll-uk.yaml b/xero-payroll-uk.yaml
index 18447c3de..48877096f 100644
--- a/xero-payroll-uk.yaml
+++ b/xero-payroll-uk.yaml
@@ -1,6 +1,6 @@
 openapi: 3.0.0
 info:
-  version: "3.0.3"
+  version: "4.0.0"
   title: 'Xero Payroll UK'
   description: 'This is the Xero Payroll API for orgs in the UK region.'
   termsOfService: "https://developer.xero.com/xero-developer-platform-terms-conditions/"
diff --git a/xero-projects.yaml b/xero-projects.yaml
index 639915d85..1f8ac18d9 100644
--- a/xero-projects.yaml
+++ b/xero-projects.yaml
@@ -1,6 +1,6 @@
 openapi: 3.0.0
 info:
-  version: "3.0.3"
+  version: "4.0.0"
   title: Xero Projects API
   description: This is the Xero Projects API 
   termsOfService: "https://developer.xero.com/xero-developer-platform-terms-conditions/"
diff --git a/xero_accounting.yaml b/xero_accounting.yaml
index 82919a4a7..d849f7502 100644
--- a/xero_accounting.yaml
+++ b/xero_accounting.yaml
@@ -1,7 +1,7 @@
 openapi: 3.0.0
 info:
   title: Xero Accounting API
-  version: "3.0.3"
+  version: "4.0.0"
   termsOfService: "https://developer.xero.com/xero-developer-platform-terms-conditions/"
   contact:
     name: "Xero Platform Team"
diff --git a/xero_assets.yaml b/xero_assets.yaml
index ef2577e0e..1bf720305 100644
--- a/xero_assets.yaml
+++ b/xero_assets.yaml
@@ -1,6 +1,6 @@
 openapi: 3.0.0
 info:
-  version: "3.0.3"
+  version: "4.0.0"
   title: Xero Assets API
   description: The Assets API exposes fixed asset related functions of the Xero Accounting application and can be used for a variety of purposes such as creating assets, retrieving asset valuations etc.
   termsOfService: "https://developer.xero.com/xero-developer-platform-terms-conditions/"
diff --git a/xero_bankfeeds.yaml b/xero_bankfeeds.yaml
index 073c7f2cb..67ada8f62 100644
--- a/xero_bankfeeds.yaml
+++ b/xero_bankfeeds.yaml
@@ -1,6 +1,6 @@
 openapi: 3.0.0
 info:
-  version: "3.0.3"
+  version: "4.0.0"
   title: Xero Bank Feeds API
   description: The Bank Feeds API is a closed API that is only available to financial institutions that have an established financial services partnership with Xero.
                If you're an existing financial services partner that wants access, contact your local Partner Manager.
diff --git a/xero_files.yaml b/xero_files.yaml
index ef0aad25c..fbc6dc1b3 100644
--- a/xero_files.yaml
+++ b/xero_files.yaml
@@ -4,7 +4,7 @@ servers:
     url: https://api.xero.com/files.xro/1.0/
 info:
   title: Xero Files API
-  version: "3.0.3"
+  version: "4.0.0"
   description: "These endpoints are specific to Xero Files API"
   termsOfService: "https://developer.xero.com/xero-developer-platform-terms-conditions/"
   contact: