diff --git a/repositories.txt b/repositories.txt
index b4f61012c..bb9799059 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -1,3 +1,4 @@
+https://github.com/m5stack/M5Unit-EXTIO
 https://github.com/jmksn/ArduEasy
 https://github.com/austin207/ArduinoCalculus.git
 https://github.com/salim-mrw/USB-Rubber