diff --git a/lib/myob/api/client.rb b/lib/myob/api/client.rb
index bfa1c35..74dbf77 100644
--- a/lib/myob/api/client.rb
+++ b/lib/myob/api/client.rb
@@ -20,6 +20,7 @@ def initialize(options)
           :site          => 'https://secure.myob.com',
           :authorize_url => '/oauth2/account/authorize',
           :token_url     => '/oauth2/v1/authorize',
+          :auth_scheme   => :request_body
         })
 
         # on client init, if we have a company file already, get the appropriate base URL for this company file from MYOB