diff --git a/assets/css/themes/default.scss b/assets/css/themes/default.scss
index 41d2cb62..8467e5c8 100644
--- a/assets/css/themes/default.scss
+++ b/assets/css/themes/default.scss
@@ -213,6 +213,10 @@ $pagination-disabled-border-color: $pagination-border-color !default;
     border: 1px solid $gray-400 !important;
 }
 
+.btn-close {
+    opacity: .3;
+}
+
 // Typography
 
 body {