diff --git a/public/assets/styles/default.css b/public/assets/styles/default.css
index e17eac81..dcef8dac 100644
--- a/public/assets/styles/default.css
+++ b/public/assets/styles/default.css
@@ -152,7 +152,7 @@ textarea::-ms-input-placeholder,
 .book-cover-item-cover,
 .book-item-list-cover {
   background: rgba(255, 255, 255, 1);
-  box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.3);
+  box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.18);
 }
 .backup-page-backup-selector,
 .message-box-container {