diff --git a/repositories.txt b/repositories.txt
index 0a2429a1..c3f94e31 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -1,3 +1,4 @@
+https://github.com/bolderflight/polytools
 https://github.com/bolderflight/eigen
 https://github.com/bolderflight/control
 https://github.com/bolderflight/imap