diff --git a/py-polars/docs/source/reference/expressions/boolean.rst b/py-polars/docs/source/reference/expressions/boolean.rst
index 2575c6426ae6..73c68917d515 100644
--- a/py-polars/docs/source/reference/expressions/boolean.rst
+++ b/py-polars/docs/source/reference/expressions/boolean.rst
@@ -17,7 +17,6 @@ Boolean
     Expr.is_infinite
     Expr.is_last
     Expr.is_last_distinct
-    Expr.is_between
     Expr.is_nan
     Expr.is_not
     Expr.is_not_nan
diff --git a/py-polars/docs/source/reference/series/descriptive.rst b/py-polars/docs/source/reference/series/descriptive.rst
index b5c952deffbf..6ec39e326b9f 100644
--- a/py-polars/docs/source/reference/series/descriptive.rst
+++ b/py-polars/docs/source/reference/series/descriptive.rst
@@ -22,7 +22,6 @@ Descriptive
     Series.is_integer
     Series.is_last
     Series.is_last_distinct
-    Series.is_between
     Series.is_nan
     Series.is_not_nan
     Series.is_not_null