diff --git a/_includes/layout_partials/foot.html b/_includes/layout_partials/foot.html
index 78f4a6c..a621f71 100644
--- a/_includes/layout_partials/foot.html
+++ b/_includes/layout_partials/foot.html
@@ -41,7 +41,7 @@
             Creative CommonsAttribution-ShareAlike 4.0 International License</a>.
             <br />Based on a work at
         <a xmlns:dct="http://purl.org/dc/terms/"
-           href="http://www.sqlstyle.guide"
+           href="https://www.sqlstyle.guide"
            rel="dct:source">www.sqlstyle.guide</a>.
     </p>
     <div class="buttons">