diff --git a/cron.nix b/cron.nix
new file mode 100644
index 0000000..a2e5606
--- /dev/null
+++ b/cron.nix
@@ -0,0 +1,11 @@
+{ config, pkgs, ... }:
+
+{
+  services.cron = {
+    enable = true;
+    systemCronJobs = [
+      # ISP speed test (unify-admin: scripts/uplink_logger.py), hourly at :05
+      "5 * * * *  stormwind  ${pkgs.python3}/bin/python3 /home/stormwind/isp-speed-test/uplink_logger.py 2>> /home/stormwind/isp-speed-test/uplink_logger.err"
+    ];
+  };
+}
diff --git a/master.nix b/master.nix
index 9f665ca..0482198 100644
--- a/master.nix
+++ b/master.nix
@@ -24,7 +24,7 @@ in
     ./incus.nix
     ./drives.nix
     ./prometheus.nix
-    #./cron.nix
+    ./cron.nix
     #./auto-upgrade.nix
   ];