diff --git a/pandas/core/indexes/base.py b/pandas/core/indexes/base.py
index 852049804a4f5..855425c3cb636 100644
--- a/pandas/core/indexes/base.py
+++ b/pandas/core/indexes/base.py
@@ -4912,6 +4912,10 @@ def values(self) -> ArrayLike:
            :meth:`Index.to_numpy`, depending on whether you need
            a reference to the underlying data or a NumPy array.
 
+        .. versionchanged:: 3.0.0
+
+           The returned array is read-only.
+
         Returns
         -------
         array: numpy.ndarray or ExtensionArray