diff --git a/hosts/desktop/hardware-configuration.nix b/hosts/desktop/hardware-configuration.nix
index f7b9ca2..8a27aef 100644
--- a/hosts/desktop/hardware-configuration.nix
+++ b/hosts/desktop/hardware-configuration.nix
@@ -89,6 +89,7 @@
 
   systemd.timers = {
       btrbk-bak = {
+          after = [ "network-online.target" ];
           requires = [ "network-online.target" ];
       };
   };
diff --git a/hosts/lifebook/hardware-configuration.nix b/hosts/lifebook/hardware-configuration.nix
index a22927f..5a8a004 100644
--- a/hosts/lifebook/hardware-configuration.nix
+++ b/hosts/lifebook/hardware-configuration.nix
@@ -112,6 +112,7 @@
   
   systemd.timers = {
       btrbk-bak = {
+          after = [ "network-online.target" ];
           requires = [ "network-online.target" ];
       };
   };