diff --git a/README.md b/README.md
index c6a103f..38ac6c6 100644
--- a/README.md
+++ b/README.md
@@ -291,6 +291,9 @@ const client = new ClientCredentials({
     tokenHost: 'https://api.helloasso.com',
     tokenPath: '/oauth2/token',
   },
+  options: {
+    authorizationMethod: 'body',
+  },
 });
 
 // Get an access token
@@ -425,4 +428,4 @@ const { authorizationUri, codeVerifier } = getAuthorizationUrl();
 This SDK is automatically generated by the [OpenAPI Generator](https://openapi-generator.tech) project:
 
 - Generator version: 7.10.0
-- Build package: org.openapitools.codegen.languages.JavascriptClientCodegen
\ No newline at end of file
+- Build package: org.openapitools.codegen.languages.JavascriptClientCodegen