diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 9f58d78..ec1df5f 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -4,7 +4,7 @@
 Versions are year-based with a strict backward-compatibility policy.
 The third digit is only for regressions.
 
-20.0.0 (UNRELEASED)
+20.0.0 (2020-11-27)
 -------------------
 
 
diff --git a/setup.py b/setup.py
index 08769d2..fbd6571 100755
--- a/setup.py
+++ b/setup.py
@@ -83,6 +83,7 @@
             "Programming Language :: Python :: 3.6",
             "Programming Language :: Python :: 3.7",
             "Programming Language :: Python :: 3.8",
+            "Programming Language :: Python :: 3.9",
             "Programming Language :: Python :: Implementation :: CPython",
             "Programming Language :: Python :: Implementation :: PyPy",
             "Topic :: Security :: Cryptography",
diff --git a/src/OpenSSL/version.py b/src/OpenSSL/version.py
index 76de33a..6ea3bef 100644
--- a/src/OpenSSL/version.py
+++ b/src/OpenSSL/version.py
@@ -17,7 +17,7 @@
     "__version__",
 ]
 
-__version__ = "20.0.0.dev"
+__version__ = "20.0.0"
 
 __title__ = "pyOpenSSL"
 __uri__ = "https://pyopenssl.org/"
@@ -25,4 +25,4 @@
 __author__ = "The pyOpenSSL developers"
 __email__ = "cryptography-dev@python.org"
 __license__ = "Apache License, Version 2.0"
-__copyright__ = "Copyright 2001-2017 {0}".format(__author__)
+__copyright__ = "Copyright 2001-2020 {0}".format(__author__)