diff --git a/repositories.txt b/repositories.txt
index 6206d1dc..277fa0ad 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -6029,3 +6029,4 @@ https://github.com/DeimosHall/RP2040_CPU_Temperature.git
 https://github.com/mizuyoukanao/Bluewhale
 https://github.com/machinefi/psa-crypto-arduino
 https://github.com/AbdoullahBougataya/QCFA
+https://github.com/CMB27/ModbusRTUMaster