diff --git a/landing/connect-farcaster.react.js b/landing/connect-farcaster.react.js
--- a/landing/connect-farcaster.react.js
+++ b/landing/connect-farcaster.react.js
@@ -22,7 +22,7 @@
 function onSuccessCallback({ fid }: OnSuccessCallbackArgs) {
   postMessageToNativeWebView({
     type: 'farcaster_data',
-    fid,
+    fid: fid.toString(),
   });
 }