diff --git a/repositories.txt b/repositories.txt
index 6f807422..3245e8f1 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -8258,3 +8258,4 @@ https://github.com/John-Karatka/MAX6953
 https://github.com/MicroSui/microsui-lib
 https://github.com/muki01/OBD2_KLine_Library
 https://github.com/max22-/ble-keyboard-mouse-client
+https://github.com/John-Karatka/DS1621