diff --git a/seed/challenges/html5-and-css.json b/seed/challenges/html5-and-css.json
index 6b9436ea4d..9dbeb0a107 100644
--- a/seed/challenges/html5-and-css.json
+++ b/seed/challenges/html5-and-css.json
@@ -1157,9 +1157,11 @@
         "</style>",
         "",
         "<h2 class=\"red-text\">CatPhotoApp</h2>",
+        "<!--Do not alter code above this line-->",
         "",
         "<a href=\"http://www.freecatphotoapp.com\">cat photos</a>",
         "",
+        "<!--Do not alter code below this line-->",
         "<img class=\"smaller-image thick-green-border\" src=\"https://bit.ly/fcc-relaxing-cat\">",
         "",
         "<p class=\"red-text\">Kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff.</p>",