diff --git a/CHANGES.rst b/CHANGES.rst
index 58461f0..4682c35 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,6 +4,16 @@ Changes
 Unreleased
 ----------
 
+Version 2.7.2
+-------------
+
+Released 2023-11-12
+
+- Fix context string for countersignature. `#471 <https://github.com/dajiaji/python-cwt/pull/471>`__
+- Fix key_ops validation. `#470 <https://github.com/dajiaji/python-cwt/pull/471>`__
+- Update dev dependencies.
+    - Bump sphinx-autodoc-typehints to 1.25.0. `#469 <https://github.com/dajiaji/python-cwt/pull/469>`__
+
 Version 2.7.1
 -------------
 
diff --git a/README.md b/README.md
index fee20da..9b2c878 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ implementation compliant with:
 - [RFC9053: CBOR Object Signing and Encryption (COSE): Initial Algorithms](https://www.rfc-editor.org/rfc/rfc9053.html)
 - [RFC9338: CBOR Object Signing and Encryption (COSE): Countersignatures](https://www.rfc-editor.org/rfc/rfc9338.html) - experimental
 - [RFC8392: CWT (CBOR Web Token)](https://tools.ietf.org/html/rfc8392)
-- [draft-06: Use of HPKE with COSE](https://www.ietf.org/archive/id/draft-ietf-cose-hpke-06.html) - experimental
+- [draft-07: Use of HPKE with COSE](https://www.ietf.org/archive/id/draft-ietf-cose-hpke-07.html) - experimental
 - [draft-06: CWT Claims in COSE Headers](https://www.ietf.org/archive/id/draft-ietf-cose-cwt-claims-in-headers-06.html) - experimental
 - and related various specifications. See [Referenced Specifications](#referenced-specifications).
 
@@ -1746,7 +1746,7 @@ Python CWT is (partially) compliant with following specifications:
 - [RFC8230: Using RSA Algorithms with COSE Messages](https://tools.ietf.org/html/rfc8230)
 - [RFC9459: CBOR Object Signing and Encryption (COSE): AES-CTR and AES-CBC](https://www.rfc-editor.org/rfc/rfc9459.html) - experimental
 - [RFC8152: CBOR Object Signing and Encryption (COSE)](https://tools.ietf.org/html/rfc8152)
-- [draft-05: Use of HPKE with COSE](https://www.ietf.org/archive/id/draft-ietf-cose-hpke-06.html) - experimental
+- [draft-07: Use of HPKE with COSE](https://www.ietf.org/archive/id/draft-ietf-cose-hpke-07.html) - experimental
 - [draft-06: CWT Claims in COSE Headers](https://www.ietf.org/archive/id/draft-ietf-cose-cwt-claims-in-headers-06.html) - experimental
 - [Electronic Health Certificate Specification](https://github.com/ehn-dcc-development/hcert-spec/blob/main/hcert_spec.md)
 - [Technical Specifications for Digital Green Certificates Volume 1](https://ec.europa.eu/health/sites/default/files/ehealth/docs/digital-green-certificates_v1_en.pdf)
diff --git a/cwt/__init__.py b/cwt/__init__.py
index 60fa26f..ae1470f 100644
--- a/cwt/__init__.py
+++ b/cwt/__init__.py
@@ -27,7 +27,7 @@
 from .recipient import Recipient
 from .signer import Signer
 
-__version__ = "2.7.1"
+__version__ = "2.7.2"
 __title__ = "cwt"
 __description__ = "A Python implementation of CWT/COSE"
 __url__ = "https://python-cwt.readthedocs.io"
diff --git a/pyproject.toml b/pyproject.toml
index 712079c..95cebe8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.poetry]
 name = "cwt"
-version = "2.7.1"
+version = "2.7.2"
 description = "A Python implementation of CWT/COSE."
 authors = ["Ajitomi Daisuke <dajiaji@gmail.com>"]
 license = "MIT"