diff --git a/00-default/wlsunset.rules b/00-default/wlsunset.rules
new file mode 100644
index 0000000..e19e789
--- /dev/null
+++ b/00-default/wlsunset.rules
@@ -0,0 +1,3 @@
+# Day/night gamma adjustments for Wayland compositors
+# https://sr.ht/~kennylevinsen/wlsunset/
+{ "name": "wlsunset", "type": "BG_CPUIO" }