diff --git a/registry.txt b/registry.txt
index f2ef258e..6594f467 100644
--- a/registry.txt
+++ b/registry.txt
@@ -5146,3 +5146,4 @@ https://github.com/AI5GW/Baudot-Encode-Decode.git|Contributed|BaudotCode
 https://github.com/chrmlinux/rssRead.git|Contributed|rssRead
 https://github.com/sparkfun/SparkFun_BMP581_Arduino_Library.git|Contributed|SparkFun BMP581 Arduino Library
 https://github.com/GyverLibs/VirtualButton.git|Contributed|VirtualButton
+https://github.com/m5stack/M5Unit-RTC.git|Contributed|M5Unit-RTC