diff --git a/www/conservancy/templates/opengraph_partial.html b/www/conservancy/templates/opengraph_partial.html
index 0bec2f0cd178e0d57418282adb61622d636bae82..631529df4bb3d1f3dc93484703afefc3090c1072 100644
--- a/www/conservancy/templates/opengraph_partial.html
+++ b/www/conservancy/templates/opengraph_partial.html
@@ -17,9 +17,15 @@ normally shouldn't need to:
 * type: Default "website".
 * locale: Default "en_US".
 * site_name: Default "Software Freedom Conservancy"
+* twitter_site: The name of the Twitter account that publishes this page.
+  Default "@conservancy"
 
 {% endcomment %}
 
+{# This partial needs work before other cards besides "summary" are supported. #}
+<meta property="twitter:card" content="summary">
+<meta property="twitter:site" content="{{ twitter_site|default:"@conservancy" }}">
+
 <meta property="og:type" content="{{ type|default:"website" }}">
 <meta property="og:locale" content="{{ locale|default:"en_US" }}">
 <meta property="og:site_name" content="{{ site_name|default:"Software Freedom Conservancy" }}">