diff --git a/README.md b/README.md
index e38e34bc..3c886de1 100644
--- a/README.md
+++ b/README.md
@@ -118,13 +118,13 @@ client = Kubeclient::Client.new 'https://localhost:8443/api/' , 'v1',
                                 auth_options: auth_options
 ```
 
-If your system is already configured with application default credential as described
+If your system is already configured with Google's application default credential as described
 [here](https://developers.google.com/identity/protocols/application-default-credentials)
 then you can use the following:
 
 ```ruby
 auth_options = {
-  default_credentials: true
+  use_default_gcp: true
 }
 client = Kubeclient::Client.new 'https://localhost:8443/api/' , 'v1',
                                 auth_options: auth_options