diff --git a/docs/whats-new.rst b/docs/whats-new.rst
index 4960e660..9e150be6 100644
--- a/docs/whats-new.rst
+++ b/docs/whats-new.rst
@@ -2,6 +2,10 @@
 
 What's new
 ==========
+0.5 (*unreleased*)
+------------------
+
+
 0.4 (23 Jun 2024)
 -----------------
 - adopt `SPEC0 <https://scientific-python.org/specs/spec-0000>`_ (:pull:`228`)