diff --git a/web/styles/rendered_markdown.css b/web/styles/rendered_markdown.css
index ccc5b741d8..af957d96c3 100644
--- a/web/styles/rendered_markdown.css
+++ b/web/styles/rendered_markdown.css
@@ -659,11 +659,11 @@
 .preview_content.rendered_markdown {
     /*  Ensure that the first child and last child
     don't have blank area at the top and bottom respectively. */
-    & :first-child {
+    & > :first-child {
         margin-top: 0;
     }
 
-    & :last-child {
+    & > :last-child {
         margin-bottom: 0;
     }
 }