diff --git a/modules/nixos/homeassistant/automations/lightswitch/default.nix b/modules/nixos/homeassistant/automations/lightswitch/default.nix
index b1cf19a..2258ff6 100644
--- a/modules/nixos/homeassistant/automations/lightswitch/default.nix
+++ b/modules/nixos/homeassistant/automations/lightswitch/default.nix
@@ -55,7 +55,7 @@ let
           - action: light.turn_on
             data:
               brightness_pct: ${toString lscfg.brightnessPercent}
-              kelvin: ${toString lscfg.lightTemperature}
+              color_temp_kelvin: ${toString lscfg.lightTemperature}
               transition: ${toString lscfg.transitionTime}
             metadata: {}
             target: