diff --git a/source/_layouts/base.html.twig b/source/_layouts/base.html.twig
index 8e227b0..46f5ece 100644
--- a/source/_layouts/base.html.twig
+++ b/source/_layouts/base.html.twig
@@ -1,3 +1,10 @@
+{% macro canonicalUrl(site, page) -%}
+ {{ site.url }}
+ {{- page.url != '//' ? page.url }}
+{%- endmacro %}
+
+{% import _self as helpers %}
+
@@ -6,6 +13,7 @@
+