diff --git a/snappymail/v/0.0.0/themes/SquaresDark/styles.css b/snappymail/v/0.0.0/themes/SquaresDark/styles.css
index 8e418647e..886ade640 100644
--- a/snappymail/v/0.0.0/themes/SquaresDark/styles.css
+++ b/snappymail/v/0.0.0/themes/SquaresDark/styles.css
@@ -1,5 +1,7 @@
 
 :root {
+	color-scheme: dark;
+
 	/* MAIN */
 	--main-color: #fff;
 	--main-bg-color: #48525C;