diff --git a/themes/quark-open-publishing/css/custom.css b/themes/quark-open-publishing/css/custom.css
index 84f8af20..7154a343 100644
--- a/themes/quark-open-publishing/css/custom.css
+++ b/themes/quark-open-publishing/css/custom.css
@@ -44,4 +44,5 @@
 
 #page-wrapper, #header {
     max-width: 1920px;
+	width: 100%;
 }