diff --git a/CHANGES.rst b/CHANGES.rst
index 35002a9..778f752 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,6 +4,18 @@ Changes
 Unreleased
 ----------
 
+Version 0.3.0
+-------------
+
+Released 2021-04-29
+
+- Add docstring to COSE, KeyBuilder and more. `#39 <https://github.com/dajiaji/python-cwt/pull/39>`__
+- Add support for COSE_Encrypt structure. `#36 <https://github.com/dajiaji/python-cwt/pull/36>`__
+- Add support for COSE_Signature structure. `#35 <https://github.com/dajiaji/python-cwt/pull/35>`__
+- Change protected_header type from bytes to dict. `#34 <https://github.com/dajiaji/python-cwt/pull/34>`__
+- Add support for COSE_Mac structure. `#32 <https://github.com/dajiaji/python-cwt/pull/32>`__
+- Add test for CWT. `#29 <https://github.com/dajiaji/python-cwt/pull/29>`__
+
 Version 0.2.3
 -------------
 
diff --git a/cwt/__init__.py b/cwt/__init__.py
index 1bac4b4..7656a77 100644
--- a/cwt/__init__.py
+++ b/cwt/__init__.py
@@ -6,7 +6,7 @@
 from .key_builder import KeyBuilder, cose_key
 from .recipient import Recipient
 
-__version__ = "0.2.3"
+__version__ = "0.3.0"
 __title__ = "cwt"
 __description__ = "A Python implementation of CWT/COSE"
 __url__ = "https://python-cwt.readthedocs.io"
diff --git a/setup.cfg b/setup.cfg
index ea9bd0e..9872b38 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -10,7 +10,7 @@ license = MIT
 keywords = cbor cwt cose security signature encryption token
 url = https://github.com/dajiaji/python-cwt
 classifiers =
-    Development Status :: 3 - Alpha
+    Development Status :: 4 - Beta
     Intended Audience :: Developers
     Natural Language :: English
     License :: OSI Approved :: MIT License