diff --git a/CHANGELOG.md b/CHANGELOG.md
index cd38e40f..23715b6d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-# Unreleased
+# Release 4.10.0rc1 (February 17, 2024)
 
 - Add support for PEP 728, supporting the `closed` keyword argument and the
   special `__extra_items__` key for TypedDict. Patch by Zixuan James Li.
diff --git a/pyproject.toml b/pyproject.toml
index 5bea3e9b..6351ba23 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ build-backend = "flit_core.buildapi"
 # Project metadata
 [project]
 name = "typing_extensions"
-version = "4.9.0"
+version = "4.10.0rc1"
 description = "Backported and Experimental Type Hints for Python 3.8+"
 readme = "README.md"
 requires-python = ">=3.8"