diff --git a/layouts/index.html b/layouts/index.html
index a191d2f..2843188 100644
--- a/layouts/index.html
+++ b/layouts/index.html
@@ -1,6 +1,6 @@
 {{ define "main" }}
 
-{{ $header_image := resources.Get "img/header.jpg" | fingerprint }}
+{{ $header_image := (resources.Get "img/header.jpg" | fingerprint).Resize "720x" }}
   <header id="index-header" class="d-flex align-items-center image" data-image="{{ $header_image.RelPermalink }}">
     <div class="text-center m-auto text-light">
       <h1 class="display-1">{{ .Site.Params.author_name }}</h1>