diff --git a/snappymail/v/0.0.0/themes/StripesDark/styles.css b/snappymail/v/0.0.0/themes/StripesDark/styles.css
index fcedafacd..e1de4c013 100644
--- a/snappymail/v/0.0.0/themes/StripesDark/styles.css
+++ b/snappymail/v/0.0.0/themes/StripesDark/styles.css
@@ -6,6 +6,7 @@
 	--main-color: #fff;
 	--main-bg-color: #48525C;
 	--main-bg-image: url("images/background.jpg");
+	--main-bg-size: cover;
 
 	/* LOADING */
 	--loading-color: #ddd;