Run `src/tools/update-copyright'.
diff --git a/ChangeLog.23 b/ChangeLog.23
index 1a23848..93fd33c 100644
--- a/ChangeLog.23
+++ b/ChangeLog.23
@@ -7932,7 +7932,7 @@
 
 ----------------------------------------------------------------------------
 
-Copyright 2006, 2007, 2008, 2009, 2010 by
+Copyright 2006-2015 by
 David Turner, Robert Wilhelm, and Werner Lemberg.
 
 This file is part of the FreeType project, and may only be used, modified,