diff --git a/src/cn_stock_basic_selector/__init__.py b/src/cn_stock_basic_selector/__init__.py
index 406df72..8157bef 100644
--- a/src/cn_stock_basic_selector/__init__.py
+++ b/src/cn_stock_basic_selector/__init__.py
@@ -34,7 +34,6 @@
     ("主板", 1),
     ("创业板", 2),
     ("科创板", 3),
-    ("北交所", 4),
 ])
 
 INDEXES = OrderedDict([