diff --git a/m/hut/monitoring.nix b/m/hut/monitoring.nix
index 7690724..d68fe3c 100644
--- a/m/hut/monitoring.nix
+++ b/m/hut/monitoring.nix
@@ -18,6 +18,7 @@
   services.prometheus = {
     enable = true;
     port = 9001;
+    retentionTime = "1y";
   };
 
   systemd.services.prometheus-ipmi-exporter.serviceConfig.DynamicUser = lib.mkForce false;