diff --git a/src/felis/list.py b/src/felis/list.py
index d506aa8..eb5395c 100644
--- a/src/felis/list.py
+++ b/src/felis/list.py
@@ -8,7 +8,7 @@
 from felis.order import Order
 from felis.predicate import Predicate
 
-__all__ = ["neutral", "add", "identity", "fold", "map", "join", "bind", "compose", "then", "filter", "sort"]
+__all__ = ["neutral", "append", "add", "identity", "fold", "traverse", "map", "join", "bind", "compose", "then", "filter", "sort"]
 
 
 neutral: list[Any] = []