diff --git a/repositories.txt b/repositories.txt
index b2a8a2303..137e41fe8 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -4,6 +4,7 @@ https://github.com/gavinlyonsrepo/ST7735_LTSM
 https://github.com/anaveo/ParkingSensor
 https://github.com/DIYables/arduino-uno-r4-web-server-library
 https://github.com/yosob/SL_simpletask
+https://github.com/DigitalCodesign/MentorBit-RS232
 https://github.com/DigitalCodesign/MentorBit-CANBus
 https://github.com/RileyCornelius/FormatLog
 https://github.com/DigitalCodesign/MentorBit-LIS3DH