diff --git a/app/assets/stylesheets/arclight/modules/layout.scss b/app/assets/stylesheets/arclight/modules/layout.scss
index 3e040c15f..c70074cb9 100644
--- a/app/assets/stylesheets/arclight/modules/layout.scss
+++ b/app/assets/stylesheets/arclight/modules/layout.scss
@@ -8,6 +8,7 @@
   border-bottom: $border-width solid $border-color;
   padding-bottom: $spacer * .5;
   margin-bottom: $spacer * .75;
+  width: 100%;
 
   .breadcrumb {
     .breadcrumb-item .breadcrumb {