README.md in ezclient-0.13.0 vs README.md in ezclient-0.13.1

@@ -27,10 +27,10 @@
 # Alternatively, you can just do:
 response = client.perform!(:get, url, request_options) # => EzClient::Response object
 ```
 
 Valid client options are:
-- `api_auth` – arguments for `ApiAuth.sign!`
+- `api_auth` – arguments for `ApiAuth.sign!` (see https://github.com/mgomes/api_auth)
 - `basic_auth` – arguments for basic authentication (either a hash with `:user` and `:pass` keys or a two-element array)
 - `headers` – a hash of headers for requests
 - `keep_alive` – timeout for persistent connection in seconds
 - `max_retries` – maximum number of retries in case `retry_exceptions` option is provided
 - `on_complete` – callback called on request completion