diff --git a/reference/hosts/callisto/configuration.nix b/reference/hosts/callisto/configuration.nix
index b3b64e5..84b7a43 100755
--- a/reference/hosts/callisto/configuration.nix
+++ b/reference/hosts/callisto/configuration.nix
@@ -49,6 +49,17 @@
     KERNEL=="macsmc-battery", SUBSYSTEM=="power_supply", ATTR{charge_control_end_threshold}="90", ATTR{charge_control_start_threshold}="85"
   '';
 
+  swapDevices =
+    let
+      gb = x: x * 1024;
+    in
+    [
+      {
+        device = "/var/lib/swapfile";
+        size = gb 4;
+      }
+    ];
+
   services.keyd = {
     enable = true;
     keyboards = {
diff --git a/reference/hosts/callisto/hardware-configuration.nix b/reference/hosts/callisto/hardware-configuration.nix
index ea2786b..1877c91 100644
--- a/reference/hosts/callisto/hardware-configuration.nix
+++ b/reference/hosts/callisto/hardware-configuration.nix
@@ -38,13 +38,6 @@
     ];
   };
 
-  swapDevices = [
-    {
-      device = "/var/lib/swapfile";
-      size = 32 * 1024;
-    }
-  ];
-
   # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
   # (the default) this is the recommended approach. When using systemd-networkd it's
   # still possible to use this option, but it's recommended to use it in conjunction