diff --git a/repositories.txt b/repositories.txt
index 9c26b5a0e..b4ba33ccb 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -1,3 +1,4 @@
+https://github.com/grbl/grbl
 https://github.com/ZanPekosak/AnalogFilter
 https://github.com/misa3L994/digitalIO
 https://github.com/dac1e/RcSwitchReceiver