diff --git a/lib/omniauth/strategies/line.rb b/lib/omniauth/strategies/line.rb
index 577f693..9f44ae8 100644
--- a/lib/omniauth/strategies/line.rb
+++ b/lib/omniauth/strategies/line.rb
@@ -13,6 +13,8 @@ class Line < OmniAuth::Strategies::OAuth2
         token_url: '/oauth2/v2.1/token'
       }
 
+      option :token_option[:client_id, :client_secret]
+
       # host changed
       def callback_phase
         options[:client_options][:site] = 'https://api.line.me'