diff --git a/modules/sys/security.nix b/modules/sys/security.nix
index 84b9ce5..c538485 100644
--- a/modules/sys/security.nix
+++ b/modules/sys/security.nix
@@ -2,7 +2,7 @@
   security.polkit.enable = true;
   system.autoUpgrade = {
     enable = true;
-    flake = "git+https://k3t.dev/git/nixconf.git?branch=main";
+    flake = "git+https://k3t.dev/git/nixconf.git?ref=main";
     operation = "boot";
     allowReboot = true;
     rebootWindow = { lower = "10:00"; upper = "14:00"; };