diff --git a/sigi/apps/home/templates/home/openmap.html b/sigi/apps/home/templates/home/openmap.html
index 82f1f45..b917418 100644
--- a/sigi/apps/home/templates/home/openmap.html
+++ b/sigi/apps/home/templates/home/openmap.html
@@ -17,6 +17,7 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0" />
 <meta http-equiv="Content-Type" content="text/xhtml; charset=UTF-8" />
 <meta name="robots" content="NONE,NOARCHIVE" />
+<meta name="referrer" content="strict-origin-when-cross-origin"/>
 <script type="text/javascript">
   //<![CDATA[
   window.__admin_media_prefix__ = "{% filter escapejs %}{% static "admin / " %}{% endfilter %}";