diff --git a/modules/desktop/gammastep.nix b/modules/desktop/gammastep.nix
index 19fa006..8eda381 100644
--- a/modules/desktop/gammastep.nix
+++ b/modules/desktop/gammastep.nix
@@ -8,7 +8,7 @@
     services.gammastep = {
       enable = true;
       dawnTime = "06:00";
-      duskTime = "22:30";
+      duskTime = "22:00";
       temperature = {
         day = 6500; # default upstream but not in nixpkgs, neutral
         night = 4500; # default upstream but not in nixpkgs