diff --git a/README.md b/README.md
index 449fabc4..d4094f18 100644
--- a/README.md
+++ b/README.md
@@ -125,6 +125,7 @@ ReDoc makes use of the following [vendor extensions](http://swagger.io/specifica
 * [`x-nullable`](docs/redoc-vendor-extensions.md#nullable) - mark schema param as a nullable
 * [`x-displayName`](docs/redoc-vendor-extensions.md#x-displayname) - specify human-friendly names for the menu categories
 * [`x-tagGroups`](docs/redoc-vendor-extensions.md#x-tagGroups) - group tags by categories in the side menu
+* [`x-servers`](docs/redoc-vendor-extensions.md#x-servers) - ability to specify different servers for API (backported from OpenAPI 3.0)
 
 ### `<redoc>` tag attributes
 * `spec-url` - relative or absolute url to your spec file;
diff --git a/docs/redoc-vendor-extensions.md b/docs/redoc-vendor-extensions.md
index 304795e4..955741ef 100644
--- a/docs/redoc-vendor-extensions.md
+++ b/docs/redoc-vendor-extensions.md
@@ -3,6 +3,9 @@ ReDoc makes use of the following [vendor extensions](http://swagger.io/specifica
 
 ### Swagger Object vendor extensions
 Extend OpenAPI root [Swagger Object](http://swagger.io/specification/#swaggerObject)
+#### x-servers
+Backported from OpenAPI 3.0 [`servers`](https://github.com/OAI/OpenAPI-Specification/blob/OpenAPI.next/versions/3.0.md#server-object). Currently doesn't support templates.
+
 #### x-tagGroups
 
 | Field Name     |	Type	       | Description |