diff --git a/client/components/Reader/ContentsPage/ContentsPage.vue b/client/components/Reader/ContentsPage/ContentsPage.vue
index 446f9bd0..0c6a4024 100644
--- a/client/components/Reader/ContentsPage/ContentsPage.vue
+++ b/client/components/Reader/ContentsPage/ContentsPage.vue
@@ -539,6 +539,7 @@ export default vueComponent(ContentsPage);
 
 .image-thumb {
     height: 50px;
+    background-color: white;
 }
 
 .loading-img-icon {