diff --git a/CHANGES.rst b/CHANGES.rst
index 4394c1a..a3cc037 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,6 +4,11 @@ Changes
 Unreleased
 ----------
 
+Version 1.0.0
+--------------
+
+Released 2021-06-24
+
 - Make MAC key can be derived with ECDH. `#139 <https://github.com/dajiaji/python-cwt/pull/139>`__
 - Add RawKey for key material. `#138 <https://github.com/dajiaji/python-cwt/pull/138>`__
 - Make MAC key can be derived with HKDF. `#137 <https://github.com/dajiaji/python-cwt/pull/137>`__
diff --git a/cwt/__init__.py b/cwt/__init__.py
index 6cf3315..ecc1cf0 100644
--- a/cwt/__init__.py
+++ b/cwt/__init__.py
@@ -15,7 +15,7 @@
 from .recipient import Recipient
 from .signer import Signer
 
-__version__ = "0.10.0"
+__version__ = "1.0.0"
 __title__ = "cwt"
 __description__ = "A Python implementation of CWT/COSE"
 __url__ = "https://python-cwt.readthedocs.io"