diff --git a/_includes/head.html b/_includes/head.html
index ee4586f..763bdc2 100644
--- a/_includes/head.html
+++ b/_includes/head.html
@@ -18,6 +18,9 @@
   <link rel="stylesheet" href="{{ "/css/font-awesome.css" | prepend: site.baseurl }}"/>
   <link rel="stylesheet" href="{{ "/css/style.css" | prepend: site.baseurl }}"/>
   <link rel="stylesheet" href="{{ "/css/responsive.css" | prepend: site.baseurl }}"/>
+  <link rel="stylesheet" href="https://unpkg.com/leaflet@1.3.1/dist/leaflet.css"
+   integrity="sha512-Rksm5RenBEKSKFjgI3a41vrjkw4EVPlJ3+OiI65vTjIdo9brlAacEuKOiQ5OFh7cOI1bkDwLqdLw3Zg0cRJAAQ=="
+   crossorigin=""/>
 
   <script src="{{ "/bower_components/modernizr/modernizr.js" | prepend: site.baseurl }}"></script>