diff --git a/hosts/builder/default.nix b/hosts/builder/default.nix
index 84d1299..e098bb3 100644
--- a/hosts/builder/default.nix
+++ b/hosts/builder/default.nix
@@ -43,6 +43,15 @@
     cores = 0;
   };
 
+  system.autoUpgrade = {
+    enable = true;
+    flake = "git+https://gitlab.julian-mutter.de/julian/dotfiles";
+    flags = [
+      "--recreate-lock-file" # update lock file
+    ];
+    dates = "02:13";
+  };
+
   # optimize store by hardlinking store files
   nix.optimise.automatic = true;
   nix.optimise.dates = ["03:15"];