diff --git a/website/web/templates/index.html b/website/web/templates/index.html
index a744210..513f4b8 100644
--- a/website/web/templates/index.html
+++ b/website/web/templates/index.html
@@ -20,6 +20,7 @@
   property="og:url"
   content="//{{public_domain}}"
 />
+<meta name="twitter:card" content="summary">
 {% endblock %}
 
 {% block scripts %}
diff --git a/website/web/templates/tree.html b/website/web/templates/tree.html
index 4406d8f..2f27b7f 100644
--- a/website/web/templates/tree.html
+++ b/website/web/templates/tree.html
@@ -20,6 +20,7 @@
   property="og:url"
   content="//{{public_domain}}{{ url_for('tree', tree_uuid=tree_uuid) }}"
 />
+<meta name="twitter:card" content="summary_large_image">
 {% endblock %}
 
 {% block scripts %}