diff --git a/machine-confs/helium.nix b/machine-confs/helium.nix
index 52e4d20..d19966d 100644
--- a/machine-confs/helium.nix
+++ b/machine-confs/helium.nix
@@ -74,6 +74,8 @@
     ${pkgs.xorg.xrandr}/bin/xrandr --output DisplayPort-0 --auto --pos 0x0 --primary --output eDP --auto --pos 3840x360
   '';
 
+  system.autoUpgrade.allowReboot = pkgs.lib.mkForce false;
+
   swapDevices = pkgs.lib.mkForce [
     {
       device = "/var/lib/swapfile";
diff --git a/machine-confs/lithium.nix b/machine-confs/lithium.nix
index c74edf6..a4af369 100644
--- a/machine-confs/lithium.nix
+++ b/machine-confs/lithium.nix
@@ -45,6 +45,8 @@
     ../hardware-specific/usb-automount.nix
   ];
 
+  system.autoUpgrade.allowReboot = pkgs.lib.mkForce false;
+
   swapDevices = pkgs.lib.mkForce [
     {
       device = "/var/lib/swapfile";