Update bitflyer doc link
diff --git a/js/bitflyer.js b/js/bitflyer.js
index bb934b081d35..830bd1d7e500 100644
--- a/js/bitflyer.js
+++ b/js/bitflyer.js
@@ -28,7 +28,7 @@ module.exports = class bitflyer extends Exchange {
                 'logo': 'https://user-images.githubusercontent.com/1294454/28051642-56154182-660e-11e7-9b0d-6042d1e6edd8.jpg',
                 'api': 'https://api.bitflyer.jp',
                 'www': 'https://bitflyer.jp',
-                'doc': 'https://bitflyer.jp/API',
+                'doc': 'https://lightning.bitflyer.com/docs?lang=en',
             },
             'api': {
                 'public': {
