diff --git a/repositories.txt b/repositories.txt
index 74e77b79..36037815 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -1,3 +1,4 @@
+https://github.com/Witty-Wizard/SerialIO
 https://github.com/fanfanlatulipe26/FS_MX1508
 https://github.com/crozone-technology/crozone-veml6040
 https://github.com/I-AM-ENGINEER/MT6701-arduino