diff --git a/LICENSE b/LICENSE
index 5fbb03be0..79380d7db 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2001-2019
+Copyright (c) 2001-2020
 Allen Short
 Amber Hawkie Brown
 Andrew Bennetts
diff --git a/README.rst b/README.rst
index 55e3e1a4a..d28319f33 100644
--- a/README.rst
+++ b/README.rst
@@ -72,7 +72,7 @@ Some of these tests may fail if you:
 Copyright
 ---------
 
-All of the code in this distribution is Copyright (c) 2001-2019 Twisted Matrix Laboratories.
+All of the code in this distribution is Copyright (c) 2001-2020 Twisted Matrix Laboratories.
 
 Twisted is made available under the MIT license.
 The included `LICENSE <LICENSE>`_ file describes this in detail.
diff --git a/src/twisted/copyright.py b/src/twisted/copyright.py
index 4e7523e70..4631ee250 100644
--- a/src/twisted/copyright.py
+++ b/src/twisted/copyright.py
@@ -14,7 +14,7 @@ from twisted import __version__ as version, version as longversion
 longversion = str(longversion)
 
 copyright="""\
-Copyright (c) 2001-2019 Twisted Matrix Laboratories.
+Copyright (c) 2001-2020 Twisted Matrix Laboratories.
 See LICENSE for details."""
 
 disclaimer='''