diff --git a/modules/nixos/system/hw/power/default.nix b/modules/nixos/system/hw/power/default.nix
index e86ae44..2ea5a82 100644
--- a/modules/nixos/system/hw/power/default.nix
+++ b/modules/nixos/system/hw/power/default.nix
@@ -15,10 +15,10 @@
     # suspend to RAM (deep) rather than `s2idle`
     boot.kernelParams = [ "mem_sleep_default=deep" ];
     # suspend-then-hibernate
-    systemd.sleep.extraConfig = ''
-      HibernateDelaySec=30m
-      SuspendState=mem
-    '';
+    systemd.sleep.settings.Sleep = {
+      HibernateDelaySec = "30m";
+      SuspendState = "mem";
+    };
 
     services.logind.settings.Login.HandleLidSwitch = "suspend-then-hibernate";
     # Hibernate on power button pressed