diff --git a/registry.txt b/registry.txt
index 71ddd3b0..7fcc2ee6 100644
--- a/registry.txt
+++ b/registry.txt
@@ -1267,3 +1267,4 @@ https://github.com/krpc/krpc-arduino.git|Contributed|kRPC
 https://github.com/Jomelo/LCDMenuLib2.git|Contributed|LCDMenuLib2
 https://github.com/Nkawu/TFT_22_ILI9225.git|Contributed|TFT_22_ILI9225
 https://github.com/r-downing/AutoPID.git|Contributed|AutoPID
+https://github.com/Geabong/ModbusRTUSlaveArduino.git|Contributed|ModbusRTU_Slave