diff --git a/index.html b/index.html
index b0df8a7..f77a4dc 100644
--- a/index.html
+++ b/index.html
@@ -32,7 +32,7 @@
         },
       ],
       latestVersion: null,
-      xref: ["web-platform", "streams", "permissions-policy", "HTML", "infra", "DOM", "webidl"],
+      xref: ["web-platform", "streams", "permissions-policy", "HTML", "infra", "DOM", "webidl", "isolated-contexts"],
       // eventually add mdn: true, and caniuse: "direct-sockets"
     };
   </script>