diff --git a/src/components/attachment/attachment.vue b/src/components/attachment/attachment.vue
index 94e88d52..a9dbecd9 100644
--- a/src/components/attachment/attachment.vue
+++ b/src/components/attachment/attachment.vue
@@ -43,6 +43,7 @@
           align-self: flex-start;
 
           &.html {
+            border: 1px solid;
             flex-basis: 100%;
           }