diff --git a/public/silent-check-sso.html b/public/silent-check-sso.html
new file mode 100644
index 0000000..88555dc
--- /dev/null
+++ b/public/silent-check-sso.html
@@ -0,0 +1,2 @@
+<!doctype html>
+<html><body><script>parent.postMessage(location.href, location.origin);</script></body></html>