diff --git a/README.md b/README.md
index f0f23029..8c4322fc 100644
--- a/README.md
+++ b/README.md
@@ -128,7 +128,7 @@ If you'd like to use the bundle files via npm, check out the [`swagger-ui-dist`
 
 Parameter Name | Description
 --- | ---
-url | The url pointing to API definition (normally `swagger.json` or `swagger.yaml`).
+url | The url pointing to API definition (normally `swagger.json` or `swagger.yaml`). Will be ignored if `urls` or `spec` is used. 
 urls | An array of API definition objects (`{url: "<url>", name: "<name>"}`) used by Topbar plugin. When used and Topbar plugin is enabled, the `url` parameter will not be parsed.
 spec | A JSON object describing the OpenAPI Specification. When used, the `url` parameter will not be parsed. This is useful for testing manually-generated specifications without hosting them.
 validatorUrl | By default, Swagger-UI attempts to validate specs against swagger.io's online validator. You can use this parameter to set a different validator URL, for example for locally deployed validators ([Validator Badge](https://github.com/swagger-api/validator-badge)). Setting it to `null` will disable validation.