diff --git a/repositories.txt b/repositories.txt
index 7deeb91a..0a3819e8 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -1,3 +1,4 @@
+https://github.com/cygig/MonteCarloPi
 https://github.com/ncmreynolds/pimoroniTrackball
 https://github.com/AlexIII/incbin-arduino
 https://github.com/bolderflight/units