diff --git a/CHANGES.rst b/CHANGES.rst
index 3ae1727..233126d 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,6 +4,27 @@ Changes
 Unreleased
 ----------
 
+Version 2.5.0
+-------------
+
+Released 2023-09-09
+
+- Update IETF I-D references in README. `#412 <https://github.com/dajiaji/python-cwt/pull/412>`__
+- Add enum COSEKeyParams. `#411 <https://github.com/dajiaji/python-cwt/pull/411>`__
+- Add enum COSEAlgs. `#409 <https://github.com/dajiaji/python-cwt/pull/409>`__
+- Update dependencies.
+    - Bump cryptography to 41.0.3. `#416 <https://github.com/dajiaji/python-cwt/pull/416>`__
+- Update dev dependencies.
+    - Bump pytest to 7.4.2. `#430 <https://github.com/dajiaji/python-cwt/pull/430>`__
+    - Bump tox to 4.11.2. `#429 <https://github.com/dajiaji/python-cwt/pull/429>`__
+    - Bump pre-commit to 3.4.0. `#427 <https://github.com/dajiaji/python-cwt/pull/427>`__
+    - Bump sphinx-autodoc-typehints to 1.24.0. `#424 <https://github.com/dajiaji/python-cwt/pull/424>`__
+    - Bump sphinx to 7.1.2. `#423 <https://github.com/dajiaji/python-cwt/pull/423>`__
+    - Bump certifi to 2023.7.22. `#422 <https://github.com/dajiaji/python-cwt/pull/422>`__
+    - Bump sphinx-rtd-theme to 1.3.0. `#420 <https://github.com/dajiaji/python-cwt/pull/420>`__
+    - Bump pre-commit/blacken-docs to 1.15.0. `#413 <https://github.com/dajiaji/python-cwt/pull/413>`__
+    - Bump pre-commit/black to 23.7.0. `#413 <https://github.com/dajiaji/python-cwt/pull/413>`__
+
 Version 2.4.0
 -------------
 
diff --git a/SECURITY.md b/SECURITY.md
index 8d10851..0d1078d 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -4,8 +4,8 @@
 
 | Version | Supported          |
 | ------- | ------------------ |
-| 2.4.x   | :white_check_mark: |
-| < 2.4   | :x:                |
+| 2.5.x   | :white_check_mark: |
+| < 2.5   | :x:                |
 
 ## Reporting a Vulnerability
 
diff --git a/cwt/__init__.py b/cwt/__init__.py
index 55bc8a3..701a731 100644
--- a/cwt/__init__.py
+++ b/cwt/__init__.py
@@ -18,7 +18,7 @@
 from .recipient import Recipient
 from .signer import Signer
 
-__version__ = "2.4.0"
+__version__ = "2.5.0"
 __title__ = "cwt"
 __description__ = "A Python implementation of CWT/COSE"
 __url__ = "https://python-cwt.readthedocs.io"
diff --git a/pyproject.toml b/pyproject.toml
index 38f2393..2b3bdb9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.poetry]
 name = "cwt"
-version = "2.4.0"
+version = "2.5.0"
 description = "A Python implementation of CWT/COSE."
 authors = ["Ajitomi Daisuke <dajiaji@gmail.com>"]
 license = "MIT"