diff --git a/htdocs/scss/app/mobile.scss b/htdocs/scss/app/mobile.scss
index 27f8416..76766dc 100644
--- a/htdocs/scss/app/mobile.scss
+++ b/htdocs/scss/app/mobile.scss
@@ -51,7 +51,7 @@ a.head-item:last-child > span {
 .index-book-image {
   float: none;
   width: 100%;
-  padding-bottom: 129.58%;
+  padding-bottom: 154%;
   //max-width: 300px;
   margin: 0 auto 15px;
   background-size: 200%;