diff --git a/layouts/partials/head/style.html b/layouts/partials/head/style.html
index 139204b..b2774c4 100644
--- a/layouts/partials/head/style.html
+++ b/layouts/partials/head/style.html
@@ -46,6 +46,7 @@
         width: 21cm;
         height: 29.7cm;
         padding: 1.2cm;
+        box-sizing: border-box;
     }
 
     ul {