diff --git a/docs/.vuepress/styles/palette.scss b/docs/.vuepress/styles/palette.scss
index 589e5832ef..e352f98b50 100644
--- a/docs/.vuepress/styles/palette.scss
+++ b/docs/.vuepress/styles/palette.scss
@@ -1,4 +1,5 @@
-$content-width: 960px;
+$sidebar-width: 16rem;
+$content-width: 1000px;
 
 html[lang="ja-JP"] {
   font-family: "Helvetica Neue, Arial, Hiragino Kaku Gothic ProN, Hiragino Sans, Meiryo, sans-serif";