diff --git a/src/client/style.scss b/src/client/style.scss
index 076c181611..f4da7cafe2 100644
--- a/src/client/style.scss
+++ b/src/client/style.scss
@@ -29,6 +29,7 @@ html {
 	font-family: "BIZ UDGothic", Roboto, HelveticaNeue, Arial, sans-serif;
 	line-height: 1.35;
 	text-size-adjust: 100%;
+	tab-size: 2;
 
 	&, * {
 		scrollbar-color: var(--scrollbarHandle) inherit;