diff --git a/app/Controllers/Payment.php b/app/Controllers/Payment.php
index 5555c746..70b9026d 100644
--- a/app/Controllers/Payment.php
+++ b/app/Controllers/Payment.php
@@ -110,7 +110,7 @@ public function tresponse() {
     $paytmChecksum = isset($_POST["CHECKSUMHASH"]) ? $_POST["CHECKSUMHASH"] : "";
     $result['receivedFromPaytm'] = $paramList;
     // Verify checksum
-    $isValidChecksum = 'TRUE';//verifychecksum_e($paramList, env('Merchant_Key'), $paytmChecksum);
+    $isValidChecksum = verifychecksum_e($paramList, env('Merchant_Key'), $paytmChecksum);
 
     if ($isValidChecksum == "TRUE") {
         //echo "<b>Checksum matched.</b><br/>";