diff --git a/dot_config/i3/config b/dot_config/i3/config
index 67a3185..842de49 100644
--- a/dot_config/i3/config
+++ b/dot_config/i3/config
@@ -19,8 +19,8 @@ set $mod Mod4
 # Display setup
 exec --no-startup-id xrandr --auto
 
-# Transfer X11 lock to i3lock (locks computer before going to sleep)
-exec xss-lock --transfer-sleep-lock -- i3lock --nofork
+# Autolock script
+exec "$HOME/.config/i3/scripts/autolock.sh"
 
 # Polybar
 exec_always --no-startup-id $HOME/.config/i3/scripts/polybar.sh
diff --git a/dot_config/i3/scripts/autolock.sh b/dot_config/i3/scripts/autolock.sh
new file mode 100644
index 0000000..55a3671
--- /dev/null
+++ b/dot_config/i3/scripts/autolock.sh
@@ -0,0 +1,22 @@
+#!/usr/bin/sh
+# Only exported variables can be used within the timer's command.
+export PRIMARY_DISPLAY="$(xrandr | awk '/ primary/{print $1}')"
+
+# Run xidlehook
+xidlehook \
+  `# Don't lock when there's a fullscreen application` \
+  --not-when-fullscreen \
+  `# Don't lock when there's audio playing` \
+  --not-when-audio \
+  `# Dim the screen after 1 minute and 20 seconds, undim if user becomes active` \
+  --timer 80 \
+    'xrandr --output "$PRIMARY_DISPLAY" --brightness .1' \
+    'xrandr --output "$PRIMARY_DISPLAY" --brightness 1' \
+  `# Undim & lock after 10 more seconds` \
+  --timer 10 \
+    'xrandr --output "$PRIMARY_DISPLAY" --brightness 1; i3lock' \
+    '' \
+  `# Finally, suspend an hour after it locks` \
+  --timer 3600 \
+    'systemctl suspend' \
+    ''