diff --git a/repositories.txt b/repositories.txt
index 2ce58276..7e3764b8 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -1,4 +1,5 @@
 https://github.com/eloquentarduino/EloquentSurveillance
+https://github.com/AI5GW/Goertzel/
 https://github.com/an7or/MAX7219Segment
 https://github.com/cjmccjmccjmc/ControlLoop
 https://github.com/boothinator/ProgmemAssert