diff --git a/modules/nixos/graphical/i3.nix b/modules/nixos/graphical/i3.nix
index c9f98cc..c596827 100644
--- a/modules/nixos/graphical/i3.nix
+++ b/modules/nixos/graphical/i3.nix
@@ -95,13 +95,15 @@ in {
 
             # Adjust screen brightness
             "Shift+F12" =
-              "exec ${pkgs.ddcutil}/bin/ddcutil --display 1 setvcp 10 + 30 && sleep 1; exec ${pkgs.ddcutil}/bin/ddcutil --display 2 setvcp 10 + 30";
+              # Disable dynamic sleep
+              # https://github.com/rockowitz/ddcutil/issues/323
+              "exec ${pkgs.ddcutil}/bin/ddcutil --display 1 setvcp 10 + 30 && sleep 1; exec ${pkgs.ddcutil}/bin/ddcutil --disable-dynamic-sleep --display 2 setvcp 10 + 30";
             "Shift+F11" =
-              "exec ${pkgs.ddcutil}/bin/ddcutil --display 1 setvcp 10 - 30 && sleep 1; exec ${pkgs.ddcutil}/bin/ddcutil --display 2 setvcp 10 - 30";
+              "exec ${pkgs.ddcutil}/bin/ddcutil --display 1 setvcp 10 - 30 && sleep 1; exec ${pkgs.ddcutil}/bin/ddcutil --disable-dynamic-sleep --display 2 setvcp 10 - 30";
             "XF86MonBrightnessUp" =
-              "exec ${pkgs.ddcutil}/bin/ddcutil --display 1 setvcp 10 + 30 && sleep 1; exec ${pkgs.ddcutil}/bin/ddcutil --display 2 setvcp 10 + 30";
+              "exec ${pkgs.ddcutil}/bin/ddcutil --display 1 setvcp 10 + 30 && sleep 1; exec ${pkgs.ddcutil}/bin/ddcutil --disable-dynamic-sleep --display 2 setvcp 10 + 30";
             "XF86MonBrightnessDown" =
-              "exec ${pkgs.ddcutil}/bin/ddcutil --display 1 setvcp 10 - 30 && sleep 1; exec ${pkgs.ddcutil}/bin/ddcutil --display 2 setvcp 10 - 30";
+              "exec ${pkgs.ddcutil}/bin/ddcutil --display 1 setvcp 10 - 30 && sleep 1; exec ${pkgs.ddcutil}/bin/ddcutil --disable-dynamic-sleep --display 2 setvcp 10 - 30";
 
             # Media player controls
             "XF86AudioPlay" = "exec ${pkgs.playerctl}/bin/playerctl play-pause";
diff --git a/modules/nixos/graphical/rofi/brightness.nix b/modules/nixos/graphical/rofi/brightness.nix
index 91c7ca3..ff538c6 100755
--- a/modules/nixos/graphical/rofi/brightness.nix
+++ b/modules/nixos/graphical/rofi/brightness.nix
@@ -28,17 +28,18 @@ in {
               -sep ';' \
               -selected-row 1)
 
+
       case "$chosen" in
           "$dimmer")
-              ${pkgs.ddcutil}/bin/ddcutil --display 1 setvcp 10 25; ${pkgs.ddcutil}/bin/ddcutil --display 2 setvcp 10 25
+              ${pkgs.ddcutil}/bin/ddcutil --display 1 setvcp 10 25; ${pkgs.ddcutil}/bin/ddcutil --disable-dynamic-sleep --display 2 setvcp 10 25
               ;;
 
           "$medium")
-              ${pkgs.ddcutil}/bin/ddcutil --display 1 setvcp 10 75; ${pkgs.ddcutil}/bin/ddcutil --display 2 setvcp 10 75
+              ${pkgs.ddcutil}/bin/ddcutil --display 1 setvcp 10 75; ${pkgs.ddcutil}/bin/ddcutil --disable-dynamic-sleep --display 2 setvcp 10 75
               ;;
 
           "$brighter")
-              ${pkgs.ddcutil}/bin/ddcutil --display 1 setvcp 10 100; ${pkgs.ddcutil}/bin/ddcutil --display 2 setvcp 10 100
+              ${pkgs.ddcutil}/bin/ddcutil --display 1 setvcp 10 100; ${pkgs.ddcutil}/bin/ddcutil --disable-dynamic-sleep --display 2 setvcp 10 100
               ;;
 
           *) exit 1 ;;