diff --git a/repositories.txt b/repositories.txt
index 976bdd856..027a404c3 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -8606,3 +8606,4 @@ https://github.com/hii-nice-2-meet-u/TINY.git
 https://github.com/hii-nice-2-meet-u/LUMINOUS.git
 https://github.com/sfera-labs/iono
 https://github.com/sfera-labs/arduino-wiegand
+https://github.com/sfera-labs/arduino-modbus-rtu-slave