diff --git a/img/greenlock-mark-400x400.png b/img/greenlock-mark-400x400.png
new file mode 100644
index 0000000..175b805
Binary files /dev/null and b/img/greenlock-mark-400x400.png differ
diff --git a/index.html b/index.html
index b26d684..5caf746 100644
--- a/index.html
+++ b/index.html
@@ -1,6 +1,7 @@
 <html>
   <head>
     <title>Greenlock&trade;</title>
+    <meta property="og:image" content="https://greenlock.ppl.family/img/greenlock-mark-400x400.png" />
   </head>
   <body hidden>
     <img width="410px" src="img/greenlock-820x150.png">
