diff --git a/repositories.txt b/repositories.txt
index f489cdf5..5f7c9c06 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -8210,3 +8210,4 @@ https://github.com/X-croot/L298N-XCR
 https://github.com/kkfranco98/FIR_Filters
 https://github.com/m-shintaro/SpresenseIMU
 https://github.com/msnicklous/CommandCatcher
+https://github.com/UnexpectedMaker/seriesd_arduino_helper