diff --git a/repositories.txt b/repositories.txt
index f8c127e3..651c3762 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -8226,3 +8226,4 @@ https://github.com/markub3327/LiquidCrystal_I2C
 https://github.com/styropyr0/Wizer
 https://github.com/bull-m/BULLM_ExtendMotor
 https://github.com/npuckett/WebGUI
+https://github.com/kolod/Arduino-Simple-Modbus-Slave