diff --git a/bin/xss-lock b/bin/xss-lock
index 502cfd1..2385b4c 100755
--- a/bin/xss-lock
+++ b/bin/xss-lock
@@ -20,24 +20,21 @@ case "$1" in
         ;;
     dim|notify)
         echo "notify: start"
-        redshift=$(systemctl --user show \
-                             --property MainPID \
-                             --value redshift@$(systemd-escape -- "$DISPLAY").service)
-        [ x$redshift = x ] || kill -STOP $redshift
-        trap "[ x$redshift = x ] || kill -CONT $redshift" EXIT
-        trap 'kill %% 2> /dev/null; exit 0' HUP  # user activity
-        trap 'sleep 0.2s; kill %% 2> /dev/null; exit 0' TERM # locker started
-        outputs=($(xrandr -q | sed -n 's/\([^ ]*\) connected .*/\1/p'))
-        for i in $(seq 0.7 -0.01 0.1); do
-            for out in ${outputs[@]}; do
-                xrandr --output $out --brightness $i || \
-                    outputs=("${outputs[@]/$out}")
-            done
-            sleep 0.1
+        trap 'echo notify: user activity; kill %% 2> /dev/null; exit 0' HUP  # user activity
+        trap 'echo notify: locker started; kill %% 2> /dev/null; exit 0' TERM # locker started
+        for i in $(seq 1.0 -0.1 0.1); do
+            awesome-client <<EOF
+for _, c in ipairs(client.get()) do
+  if c:isvisible() then
+    c.opacity=$i
+  end
+end
+EOF
+            sleep 0.2
         done
-        echo "notify: end"
         sleep infinity &
         wait
+        echo "notify: end"
         ;;
     lock)
         # Something may have mendled with screensaver settings