diff --git a/home-manager/wm/river.nix b/home-manager/wm/river.nix
index d02928e..9bfe95c 100644
--- a/home-manager/wm/river.nix
+++ b/home-manager/wm/river.nix
@@ -86,6 +86,9 @@ in
           # screen backlight brightness control
           "None XF86MonBrightnessDown" = "spawn 'brightnessctl set 1%-'";
           "None XF86MonBrightnessUp" = "spawn 'brightnessctl set 1%+'";
+          # audio volume control
+          "None XF86AudioLowerVolume" = "spawn 'wpctl set-volume @DEFAULT_SINK@ 1%-'";
+          "None XF86AudioRaiseVolume" = "spawn 'wpctl set-volume @DEFAULT_SINK@ 1%+'";
         };
       };
       map-pointer = {