diff --git a/windows/RELEASE_NOTES.md b/windows/RELEASE_NOTES.md
index 2b01c93..7bd64db 100644
--- a/windows/RELEASE_NOTES.md
+++ b/windows/RELEASE_NOTES.md
@@ -1,4 +1,3 @@
-## What's new in beta.26
+## What's new in beta.27
 
-- Fixed: script results now use window.chrome.webview.postMessage instead of async IIFE return value — older WebView2 runtimes don't await Promises from ExecuteScriptAsync, so data was never received
-- Debug text in Settings will now always show what happened during sign-in
+- Fix build error: use WebMessageAsJson (not WebMessageAsString) and post plain JS objects via postMessage