diff --git a/docs/source/hdmf_common_release_notes.rst b/docs/source/hdmf_common_release_notes.rst
index 7a7d28d..b9cb108 100644
--- a/docs/source/hdmf_common_release_notes.rst
+++ b/docs/source/hdmf_common_release_notes.rst
@@ -3,6 +3,12 @@
 hdmf-common Release Notes
 =========================
 
+1.9.0 (Upcoming)
+----------------------
+- Change the dtype of `ElementIdentifiers` and `DynamicTableRegion` from "int" to "int32". Under the current
+  schema language, "int" means "int32" so this change has no functional impact, except when displaying the 
+  spec, such as in error messages.
+
 1.8.0 (August 4, 2023)
 ----------------------
 - No change in the hdmf-common namespace. See :ref:`here <hdmf_experimental_release_notes>` for changes to the