diff --git a/copyright.txt b/copyright.txt
index 1b23a0e84..a111489d0 100644
--- a/copyright.txt
+++ b/copyright.txt
@@ -44,6 +44,7 @@ Nikolas Charalambidis - https://github.com/Nikolas-Charalambidis
 Michael Pardo - https://github.com/pardom
 Mustafa Caylak - https://github.com/luxmeter
 Oliver Ehrenmüller - https://github.com/greuelpirat
+Oliver Erhart - https://github.com/thunderhook
 Paul Strugnell - https://github.com/ps-powa
 Pascal Grün - https://github.com/pascalgn
 Pavel Makhov - https://github.com/streetturtle
@@ -67,3 +68,4 @@ Timo Eckhardt - https://github.com/timoe
 Tomek Gubala - https://github.com/vgtworld
 Valentin Kulesh - https://github.com/unshare
 Vincent Alexander Beelte - https://github.com/grandmasterpixel
+Xiu Hong Kooi - https://github.com/kooixh