diff --git a/src/you_get/extractors/bilibili.py b/src/you_get/extractors/bilibili.py
index 94e5479f..7ea626f8 100644
--- a/src/you_get/extractors/bilibili.py
+++ b/src/you_get/extractors/bilibili.py
@@ -62,7 +62,7 @@ class Bilibili(VideoExtractor):
 
     @staticmethod
     def bilibili_api(avid, cid, qn=0):
-        return 'https://api.bilibili.com/x/player/playurl?avid=%s&cid=%s&qn=%s&type=&otype=json&fnver=0&fnval=16' % (avid, cid, qn)
+        return 'https://api.bilibili.com/x/player/playurl?avid=%s&cid=%s&qn=%s&type=&otype=json&fnver=0&fnval=16&fourk=1' % (avid, cid, qn)
 
     @staticmethod
     def bilibili_audio_api(sid):