diff --git a/src/Paystack.php b/src/Paystack.php
index f4b91dc..c37fac9 100644
--- a/src/Paystack.php
+++ b/src/Paystack.php
@@ -272,9 +272,9 @@ public function isTransactionVerificationValid($transaction_id = null)
      * @return json
      * @throws PaymentVerificationFailedException
      */
-    public function getPaymentData()
+    public function getPaymentData($reference)
     {
-        if ($this->isTransactionVerificationValid()) {
+        if ($this->isTransactionVerificationValid($reference)) {
             return $this->getResponse();
         } else {
             throw new PaymentVerificationFailedException("Invalid Transaction Reference");