diff --git a/registry.txt b/registry.txt
index 7e7e89a6..115d70ca 100644
--- a/registry.txt
+++ b/registry.txt
@@ -4788,3 +4788,4 @@ https://github.com/stm32duino/ISM330DHCX.git|Contributed|STM32duino ISM330DHCX
 https://github.com/bitbank2/SLIC.git|Contributed|SLIC
 https://github.com/vChavezB/SimpleJ1939.git|Contributed|SimpleJ1939
 https://github.com/Jackal28/LMT87.git|Contributed|LMT87
+https://github.com/CMB27/ModbusRTUSlave.git|Contributed|ModbusRTUSlave