diff --git a/registry.txt b/registry.txt
index 6a0ebf83..b8c9bb4b 100644
--- a/registry.txt
+++ b/registry.txt
@@ -5158,3 +5158,4 @@ https://github.com/GyverLibs/SunPosition.git|Contributed|SunPosition
 https://github.com/m5stack/M5Unit-Sonic.git|Contributed|M5Unit-Sonic
 https://github.com/m5stack/M5Unit-UHF-RFID.git|Contributed|M5Unit-UHF-RFID
 https://github.com/m5stack/M5-FPC1020A.git|Contributed|M5-FPC1020A
+https://github.com/m5stack/M5Unit-4RELAY.git|Contributed|M5Unit-4RELAY