diff --git a/_includes/style.scss b/_includes/style.scss
index a05b808..0f82154 100644
--- a/_includes/style.scss
+++ b/_includes/style.scss
@@ -21,7 +21,7 @@ $font-size-mobile: 16px;
 $text-color:       #444;
 
 // コンテナ
-$container-box-shadow: 0 0 10px 0 #ddd;
+$container-box-shadow: 0 0 10px 0 rgba(0,0,0,0.1);
 
 // ヘッダ
 $header-background:              #eee;