diff --git a/CHANGES.txt b/CHANGES.txt
index e3a067ed2..8aa07933d 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -10,13 +10,14 @@ release.
 
 Thanks to:
 
-Kit Choi, Rahul Poruri, Pedro Rivotti, Corran Webster.
+Aaron Ayres, Kit Choi, Rahul Poruri, Pedro Rivotti, Corran Webster.
 
 Change summary
 --------------
 
 Fixes
 
+* Fix copyright header in AboutDialog. (#573)
 * Fix dock pane layout on Qt5. (#545)
 * Fix errors from incorrect QImage memory management. (#546)
 * Fix CodeWidget handling of parsed tokens which caused TraitsUI CodeEditor to
diff --git a/pyface/ui/qt4/about_dialog.py b/pyface/ui/qt4/about_dialog.py
index 433cd39c9..b34eb0035 100644
--- a/pyface/ui/qt4/about_dialog.py
+++ b/pyface/ui/qt4/about_dialog.py
@@ -48,7 +48,7 @@
       %s
       </p>
       <p>
-      Copyright &copy; 2003-2010 Enthought, Inc.<br>
+      Copyright &copy; 2003-2020 Enthought, Inc.<br>
       Copyright &copy; 2007 Riverbank Computing Limited
       </p>
   </center>