diff --git a/assets/themes/postboxes/postboxes.json b/assets/themes/postboxes/postboxes.json
index 312f5b9de4..f734760cd1 100644
--- a/assets/themes/postboxes/postboxes.json
+++ b/assets/themes/postboxes/postboxes.json
@@ -49,7 +49,7 @@
         "images",
         {
          
-          "render": "{minimap(17): height: 10rem; overflow: hidden; border-radius: 0.5rem; }"
+          "render": "{minimap(17): height: 10rem; overflow: hidden; border: 1px solid DADADA; border-radius: 0.5rem; }"
         }
       ],
       "icon": {