diff --git a/layouts/article/section.html b/layouts/article/section.html
index 977b0a39fd..c1c6090e17 100644
--- a/layouts/article/section.html
+++ b/layouts/article/section.html
@@ -5,7 +5,7 @@
     <div class="row main-top">
         <h1> Articles </h1>
         <div class="row">
-            <div class="col-sm-9">
+            <div class="col-md-9">
             {{ range .Data.Pages }}
                 {{ .Render "summary" }}
             {{ end}}