diff --git a/AUTHORS b/AUTHORS
index c1cda77..7e5301d 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -1,27 +1,43 @@
-# Authors ordered by first contribution.
+# Authors ordered alphabetically.
 
 Authors with Contributions in the Public Domain:
-
 Lewis Rossman <LRossman@cinci.rr.com>
 Michael Tryby <tryby.michael@epa.gov>
 
-Authors with Contributions Subject to Copyright (see LICENSE):
+Version 2.0
+Lewis Rossman <LRossman@cinci.rr.com>
 
-Sam Hatchett <samhatchett@gmail.com>
-Feng Shang <fshang>
-James Uber <jim@citilogics.com>
-Tom Taxon <tntaxon@anl.gov>
-Hyoungmin Woo <hyoungmin.woo@gmail.com>
-Jinduan Chen <jinduan.uc@gmail.com>
-Yunier Soad <yunier.soad@gmail.com>
-Mike Kane <muke195@gmail.com>
+Authors with Contributions Subject to Copyright (see LICENSE):
+Except where noted.
+
+Version 2.1
+Jinduan	Chen <jinduan.uc@gmail.com>
+Maurizio Cingi <mrzcng2@gmail.com>
 Demetrios Eliades <eldemet@gmail.com>
 Will Furnass <will@thearete.co.uk>
-Steffen Macke <sdteffen@sdteffen.de>
+Milad Ghiami <milad.ghiami67@gmail.com>
+Sam Hatchett <samhatchett@gmail.com>
+Mike Kane <muke195@gmail.com>
 Marios Kyriakou <mariosmsk@gmail.com>
-Elad Salomons <selad@optiwater.com>
-Maurizio Cingi <mrzcng2@gmail.com>
-Bryant McDonnell <bemcdonnell@gmail.com>
+Steffen	Macke <sdteffen@sdteffen.de>
 Angela Marchi <angela.marchi@adelaide.edu.au>
+Bryant McDonnell <bemcdonnell@gmail.com>
+Lew Rossman <LRossman@cinci.rr.com>
+Elad Salomons <selad@optiwater.com>
+Feng Shang <fengshang72@gmail.com>	
+Yunier Soad <yunier.soad@gmail.com>
+Tom Taxon <tntaxon@anl.gov>
+Michael	Tryby <tryby.michael@epa.gov> (Contributions in the Public Domain)
+James Uber <jim@citilogics.com>
+Hyoungmin Woo <hyoungmin.woo@gmail.com>
+
+Version 2.2
+Demetrios Eliades <eldemet@gmail.com>
+Sam Hatchett <samhatchett@gmail.com>
+Abel Heinsbroek <mail@abelheinsbroek.nl>
+Marios Kyriakou <mariosmsk@gmail.com>
+Lewis Rossman <LRossman@cinci.rr.com>
+Elad Salomons <selad@optiwater.com>
 Markus Sunela <markus.sunela@fluidit.fi>
-Milad Ghiami <milad-ghiami@users.noreply.github.com>
+Michael Tryby <tryby.michael@epa.gov> (Contributions in the Public Domain)
+
diff --git a/LICENSE b/LICENSE
index 09e0360..bf633d4 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2017 (see AUTHORS)
+Copyright (c) 2019 (See AUTHORS)
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -9,8 +9,8 @@ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
+The above copyright notice, list of authors, and this permission notice shall 
+be included in all copies or substantial portions of the Software. 
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,