diff --git a/repositories.txt b/repositories.txt
index e2ea75fa..a613b208 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -93,6 +93,7 @@ https://github.com/DFRobot/DFRobot_EnvironmentalSensor
 https://github.com/DFRobot/DFRobot_GM60
 https://github.com/DFRobot/DFRobot_ICG20660L
 https://github.com/DFRobot/DFRobot_TMF8x01
+https://github.com/DFRobot/DFRobot_IICSerial
 https://github.com/ZinggJM/ILI9486_SPI
 https://github.com/ZinggJM/GFX_Extensions
 https://github.com/DFRobot/DFRobot_MLX90614