diff --git a/styleguide.css b/styleguide.css
index 5bae08e..f10bf95 100644
--- a/styleguide.css
+++ b/styleguide.css
@@ -2095,7 +2095,7 @@ section + section {
   width: 100%;
   min-width: 0;
   max-width: none;
-  flex: 0 0 100%;
+  align-self: stretch;
   height: auto;
 }