diff --git a/HISTORY.rst b/HISTORY.rst
index 28516d3..9888aa6 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -3,12 +3,18 @@
 History
 -------
 
-3.5 (XXXX-XX-XX)
+3.5 (2023-11-24)
 ++++++++++++++++
-- String codec name is now 'idna2008' as overriding the system
-  codec 'idna' was not working.
+
+- Update to Unicode 15.1.0
+- String codec name is now "idna2008" as overriding the system codec
+  "idna" was not working.
 - Fix typing error for codec encoding
-- Remove 'setup.py' to complete migration to pyproject.toml
+- "setup.py" has been restored for this release due to some downstream
+  lack of adherence to PEP 517. Should be removed in a future release
+  so please prepare accordingly.
+- Removed reliance on a symlink for the "idna-data" tool to comport
+  with PEP 517 and the Python Packaging User Guide for sdist archives.
 - Added security reporting protocol for project
 
 Thanks Jon Ribbens, Diogo Teles Sant'Anna, Wu Tingfeng for contributions
diff --git a/LICENSE.md b/LICENSE.md
index cc7d6ba..ce36701 100644
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -1,6 +1,6 @@
 BSD 3-Clause License
 
-Copyright (c) 2013-2022, Kim Davies and contributors.
+Copyright (c) 2013-2023, Kim Davies and contributors.
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
diff --git a/SECURITY.md b/SECURITY.md
index 3d53a4a..9009ae9 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -1,11 +1,19 @@
 # Security Policy
 
 ## Supported Versions
+
 Security updates are applied only to the latest release.
 
 ## Reporting a Vulnerability
-If you have discovered a security vulnerability in this project, please report it privately. **Do not disclose it as a public issue.** This gives us time to work with you to fix the issue before public exposure, reducing the chance that the exploit will be used before a patch is released.
 
-Please disclose it at our [security advisory](https://github.com/kjd/idna/security/advisories/new).
+If you have discovered a security vulnerability in this project, please
+report it privately. **Do not disclose it as a public issue.** This gives
+us time to work with you to fix the issue before public exposure, reducing
+the chance that the exploit will be used before a patch is released.
+
+Please disclose your issue through Github's
+[security advisory facility](https://github.com/kjd/idna/security/advisories/new).
 
-This project is maintained by a team of volunteers on a reasonable-effort basis. As such, vulnerabilities will be disclosed in a best effort base.
+We will endeavor to prioritize review, remediation and disclosure of
+vulnerabilites. However, be mindful that this project is maintained by a
+team of volunteers who work on a best effort basis.
\ No newline at end of file
diff --git a/idna/package_data.py b/idna/package_data.py
index 8501893..2d2d651 100644
--- a/idna/package_data.py
+++ b/idna/package_data.py
@@ -1,2 +1,2 @@
-__version__ = '3.4'
+__version__ = '3.5'