diff --git a/registry.txt b/registry.txt
index 17ceb800..0a94ffda 100644
--- a/registry.txt
+++ b/registry.txt
@@ -1851,3 +1851,4 @@ https://github.com/muwerk/ustd.git|Contributed|Muwerk ustd library
 https://github.com/feklee/MultiTrans.git|Contributed|MultiTrans
 https://github.com/evert-arias/EasyButton.git|Contributed|EasyButton
 https://github.com/dycodex/ESPectro32.git|Contributed|ESPectro32
+https://github.com/tobiasschuerg/MH-Z-CO2-Sensors.git|Contributed|MH-Z CO2 Sensors