diff --git a/repositories.txt b/repositories.txt
index 32003df3..cdf0d7c2 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -401,6 +401,7 @@ https://github.com/m5stack/ATOM_DTU_CAT1
 https://github.com/m5stack/MODULE_GRBL13.2
 https://github.com/m5stack/M5Core-Ink
 https://github.com/m5stack/M5Module-4Relay
+https://github.com/m5stack/M5Module-4IN8OUT
 https://github.com/m5stack/M5Module-2Relay-13.2
 https://github.com/m5stack/M5Unit-DDS
 https://github.com/m5stack/M5Unit-PoESP32