diff --git a/releasenotes/source/index.rst b/releasenotes/source/index.rst
index f36c837..475a99c 100644
--- a/releasenotes/source/index.rst
+++ b/releasenotes/source/index.rst
@@ -6,6 +6,7 @@
    :maxdepth: 1
 
    unreleased
+   v40.0.0
    v39.0.0
    v38.0.0
    v37.0.0
diff --git a/releasenotes/source/v40.0.0.rst b/releasenotes/source/v40.0.0.rst
new file mode 100644
index 0000000..995767b
--- /dev/null
+++ b/releasenotes/source/v40.0.0.rst
@@ -0,0 +1,6 @@
+=====================
+v40.0.0 Release Notes
+=====================
+
+.. release-notes:: 40.0.0 Release Notes
+   :version: 40.0.0