diff --git a/README.md b/README.md
index 9432487..3eb250a 100644
--- a/README.md
+++ b/README.md
@@ -201,13 +201,16 @@ Pull requests are also very welcome. Please create a topic branch for your propo
 [Bert Van Vreckem](https://github.com/bertvv/) (maintainer),
 [Birgit Croux](https://github.com/birgitcroux),
 [DarkStar1973](https://github.com/DarkStar1973),
+[George Hartzell](https://github.com/hartzell),
 [Ian Young](https://github.com/iangreenleaf),
 [Jonas Heinrich](https://github.com/onny),
 [Jonathan Underwood](https://github.com/jonathanunderwood),
+[Karl Goetz](https://github.com/goetzk),
 [morbidick](https://github.com/morbidick),
 [Paul Montero](https://github.com/lpaulmp),
 [Slavek Jurkowski](https://github.com/slavekjurkowski2),
 [Sven Eeckeman](https://github.com/SvenEeckeman),
+https://github.com/hartzell,
 [Tiemo Kieft](https://github.com/blubber),
 [Tobias Wolter](https://github.com/towo),
 [Tomohiko Ozawa](https://github.com/kota65535).