diff --git a/yt_dlp/extractor/bilibili.py b/yt_dlp/extractor/bilibili.py
index 2fe1103cb9..62f68fbc6d 100644
--- a/yt_dlp/extractor/bilibili.py
+++ b/yt_dlp/extractor/bilibili.py
@@ -46,6 +46,7 @@
 
 
 class BilibiliBaseIE(InfoExtractor):
+    _HEADERS = {'Referer': 'https://www.bilibili.com/'}
     _FORMAT_ID_RE = re.compile(r'-(\d+)\.m4s\?')
     _WBI_KEY_CACHE_TIMEOUT = 30  # exact expire timeout is unclear, use 30s for one session
     _wbi_key_cache = {}
@@ -192,7 +193,7 @@ def _get_subtitles(self, video_id, cid, aid=None):
         video_info = self._download_json(
             'https://api.bilibili.com/x/player/v2', video_id,
             query={'aid': aid, 'cid': cid} if aid else {'bvid': video_id, 'cid': cid},
-            note=f'Extracting subtitle info {cid}')
+            note=f'Extracting subtitle info {cid}', headers=self._HEADERS)
         if traverse_obj(video_info, ('data', 'need_login_subtitle')):
             self.report_warning(
                 f'Subtitles are only available when logged in. {self._login_hint()}', only_once=True)
@@ -207,7 +208,7 @@ def _get_subtitles(self, video_id, cid, aid=None):
     def _get_chapters(self, aid, cid):
         chapters = aid and cid and self._download_json(
             'https://api.bilibili.com/x/player/v2', aid, query={'aid': aid, 'cid': cid},
-            note='Extracting chapters', fatal=False)
+            note='Extracting chapters', fatal=False, headers=self._HEADERS)
         return traverse_obj(chapters, ('data', 'view_points', ..., {
             'title': 'content',
             'start_time': 'from',
@@ -1021,8 +1022,6 @@ def _real_extract(self, url):
 
 
 class BilibiliCheeseBaseIE(BilibiliBaseIE):
-    _HEADERS = {'Referer': 'https://www.bilibili.com/'}
-
     def _extract_episode(self, season_info, ep_id):
         episode_info = traverse_obj(season_info, (
             'episodes', lambda _, v: v['id'] == int(ep_id)), get_all=False)