diff --git a/system/btrbk.nix b/system/btrbk.nix
index bf50fe3..a845c61 100644
--- a/system/btrbk.nix
+++ b/system/btrbk.nix
@@ -2,9 +2,10 @@
 
 {
   services.btrbk.instances.btrbk = {
+    onCalendar = "hourly";
     settings = { 
-      snapshot_preserve = "14d";
-      snapshot_preserve_min = "2d";
+      snapshot_preserve = "40d";
+      snapshot_preserve_min = "7d";
       snapshot_dir = "/btrbk_snapshots";
       subvolume = "/home";
     };