diff --git a/public/index.html b/public/index.html
index ec9eef0..55d2db1 100644
--- a/public/index.html
+++ b/public/index.html
@@ -9,6 +9,21 @@
   <meta property="og:title" content="Lexiconga Dictionary Builder">
   <meta property="og:description" content="Build lexicons for contructed languages or anything that you can think of!">
   <meta property="og:image" content="http://lexicon.ga/images/logo.svg">
+  <meta property="Content-Security-Policy"
+    content="default-src 'self';
+      base-uri 'self';
+      sandbox 'self';
+      script-src 'self';
+      child-src 'none';
+      object-src 'none';
+      plugin-types 'none';
+      connect-src 'none';
+      font-src *;
+      img-src *;
+      media-src *;
+      style-src 'self';
+      worker-src 'self';
+      form-action 'none'">
 </head>
 <body>
 <div id="site"></div>
