diff --git a/web/index.html b/web/index.html
index 21c423b..6ecdb4a 100644
--- a/web/index.html
+++ b/web/index.html
@@ -21,6 +21,12 @@
 <head>
 	<title>ades</title>
 	<meta charset="utf-8" />
+
+	<meta
+		http-equiv="Content-Security-Policy"
+		content="trusted-types 'none'; require-trusted-types-for 'script';"
+	/>
+
 	<link rel="stylesheet" href="index.css">
 	<script src="wasm_exec.js"></script>
 </head>
