diff --git a/src/routes/root.js b/src/routes/root.js
index 12e14c8..b2c45cb 100644
--- a/src/routes/root.js
+++ b/src/routes/root.js
@@ -7,7 +7,13 @@
 const renewSession = () => {
   // Call extern function
   // The extern function defines in HTML
-  sessionExtensionReq();
+  const sessionRenewFunction =
+    typeof(sessionExtensionReq) == 'function' ? sessionExtensionReq :
+    typeof(sessionExtensionReq1) == 'function' ? sessionExtensionReq1 :
+    undefined
+
+  if (sessionRenewFunction)
+    sessionRenewFunction();
   return;
 };