diff --git a/appview/ogcard/wrangler.jsonc b/appview/ogcard/wrangler.jsonc
index 8a3c8526..6fe63b91 100644
--- a/appview/ogcard/wrangler.jsonc
+++ b/appview/ogcard/wrangler.jsonc
@@ -3,6 +3,7 @@
   "name": "tangled-ogcard-worker",
   "main": "src/index.tsx",
   "compatibility_date": "2026-03-07",
+  "compatibility_flags": ["global_navigator"],
   "observability": {
     "enabled": true,
   },