diff --git a/config/redshift/hooks/brightness.sh b/config/redshift/hooks/brightness.bash
similarity index 95%
rename from config/redshift/hooks/brightness.sh
rename to config/redshift/hooks/brightness.bash
index 431b75f..d17936c 100755
--- a/config/redshift/hooks/brightness.sh
+++ b/config/redshift/hooks/brightness.bash
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 
 main() {
   : "${BRIGHTNESS_DAY:=100}"