diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 152a935990..60e631d159 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,6 +1,14 @@
 Changelog
 =========
 
+2.15.6 (05.09.2022)
+~~~~~~~~~~~~~~~~~~~
+
+ * Fix: Ensure the upgrade notification request for the latest release, which can be disabled via the `WAGTAIL_ENABLE_UPDATE_CHECK` sends the referrer origin with `strict-origin-when-cross-origin` (Karl Hobley)
+ * Fix: On the Locked Pages report, limit the "locked by" filter to just users who have locked pages (Stefan Hammer)
+ * Fix: Ensure Python 3.10 compatibility when using Elasticsearch backend (Przemysław Buczkowski, Matt Westcott)
+
+
 2.15.5 (11.04.2022)
 ~~~~~~~~~~~~~~~~~~~
 
diff --git a/docs/releases/2.15.6.rst b/docs/releases/2.15.6.rst
new file mode 100644
index 0000000000..94fc5ec060
--- /dev/null
+++ b/docs/releases/2.15.6.rst
@@ -0,0 +1,18 @@
+============================
+Wagtail 2.15.6 release notes
+============================
+
+.. contents::
+    :local:
+    :depth: 1
+
+
+What's new
+==========
+
+Bug fixes
+~~~~~~~~~
+
+ * Fix: Ensure the upgrade notification request for the latest release, which can be disabled via the `WAGTAIL_ENABLE_UPDATE_CHECK` sends the referrer origin with `strict-origin-when-cross-origin` (Karl Hobley)
+ * Fix: On the Locked Pages report, limit the "locked by" filter to just users who have locked pages (Stefan Hammer)
+ * Fix: Ensure Python 3.10 compatibility when using Elasticsearch backend (Przemysław Buczkowski, Matt Westcott)
diff --git a/docs/releases/index.rst b/docs/releases/index.rst
index 3e496be89b..c741b5eb46 100644
--- a/docs/releases/index.rst
+++ b/docs/releases/index.rst
@@ -5,6 +5,7 @@ Release notes
    :maxdepth: 1
 
    upgrading
+   2.15.6
    2.15.5
    2.15.4
    2.15.3