diff --git a/CSS/themes/calibreweb/calibreweb-base.css b/CSS/themes/calibreweb/calibreweb-base.css
index e5524dad..c300192a 100644
--- a/CSS/themes/calibreweb/calibreweb-base.css
+++ b/CSS/themes/calibreweb/calibreweb-base.css
@@ -32,3 +32,7 @@ body.login:not(.read-frame), body.shelfcreate, body.shelfedit {
         background: var(--modal-bg-color) !important;
         }
     }
+/* Book cover border */
+.container-fluid .book .cover span img {
+    border: 1px solid transparent;
+}
\ No newline at end of file