diff --git a/webapp/index.php b/webapp/index.php
index 19efba1..7ed1cb9 100644
--- a/webapp/index.php
+++ b/webapp/index.php
@@ -16,6 +16,9 @@ spl_autoload_register('autoload_controller__');
 
 function loginVerify($accountid, $sessionid)
 {
+    if (!phpcommon\isValidSessionId($accountid, $sessionid)) {
+        return false;
+    }
     return true;
 }