From: Ben Darnell <ben@bendarnell.com>
Date: Mon, 15 Dec 2025 18:36:01 +0000 (-0500)
Subject: Release notes and version bump for 6.5.4
X-Git-Tag: v6.5.4^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eadbf9adbe9db19e2686a32f48ddf9a25518c4f6;p=thirdparty%2Ftornado.git

Release notes and version bump for 6.5.4
---

diff --git a/docs/releases.rst b/docs/releases.rst
index 3d69d7af..23502c2f 100644
--- a/docs/releases.rst
+++ b/docs/releases.rst
@@ -4,6 +4,7 @@ Release notes
 .. toctree::
    :maxdepth: 2
 
+   releases/v6.5.4
    releases/v6.5.3
    releases/v6.5.2
    releases/v6.5.1
diff --git a/docs/releases/v6.5.4.rst b/docs/releases/v6.5.4.rst
new file mode 100644
index 00000000..7f3819f0
--- /dev/null
+++ b/docs/releases/v6.5.4.rst
@@ -0,0 +1,13 @@
+What's new in Tornado 6.5.4
+===========================
+
+Dec 15, 2025
+------------
+
+Bug fixes
+~~~~~~~~~
+
+- The ``in`` operator for ``HTTPHeaders`` was incorrectly case-sensitive, causing
+  lookups to fail for headers with different casing than the original header name.
+  This was a regression in version 6.5.3 and has been fixed to restore the intended
+  case-insensitive behavior from version 6.5.2 and earlier.
diff --git a/tornado/__init__.py b/tornado/__init__.py
index 86a37d12..a1001458 100644
--- a/tornado/__init__.py
+++ b/tornado/__init__.py
@@ -22,8 +22,8 @@
 # is zero for an official release, positive for a development branch,
 # or negative for a release candidate or beta (after the base version
 # number has been incremented)
-version = "6.5.3"
-version_info = (6, 5, 3, 0)
+version = "6.5.4"
+version_info = (6, 5, 4, 0)
 
 import importlib
 import typing