diff --git a/gtk/theme/Adwaita/parse-sass.sh b/gtk/theme/Adwaita/parse-sass.sh
index e9cda25641..e385f83717 100755
--- a/gtk/theme/Adwaita/parse-sass.sh
+++ b/gtk/theme/Adwaita/parse-sass.sh
@@ -1,3 +1,3 @@
-#!/usr/bin/bash
+#!/bin/sh
 
 bundle exec sass --update --sourcemap=none .