diff --git a/src/Crypt/EstPosCrypt.php b/src/Crypt/EstPosCrypt.php
index 0d6a2da8..32afddfb 100644
--- a/src/Crypt/EstPosCrypt.php
+++ b/src/Crypt/EstPosCrypt.php
@@ -24,7 +24,6 @@ public function create3DHash(AbstractPosAccount $posAccount, array $requestData)
             $requestData['islemtipi'],
             $requestData['taksit'],
             $requestData['rnd'],
-            $requestData['failUrl'], // callbackUrl
             $posAccount->getStoreKey(),
         ];
 
diff --git a/tests/Unit/Crypt/EstPosCryptTest.php b/tests/Unit/Crypt/EstPosCryptTest.php
index 1d80273b..0394f19d 100644
--- a/tests/Unit/Crypt/EstPosCryptTest.php
+++ b/tests/Unit/Crypt/EstPosCryptTest.php
@@ -48,7 +48,7 @@ public function testCreate3DHash(): void
             'failUrl'   => 'https://domain.com/fail_url',
             'rnd'       => 'rand',
         ];
-        $expected = 'TN+2/D8lijFd+5zAUar6SH6EiRY=';
+        $expected = 'S7UxUAohxaxzl35WxHyDfuQx0sg=';
 
         $actual = $this->crypt->create3DHash($this->account, $requestData);
         $this->assertEquals($expected, $actual);
@@ -68,7 +68,7 @@ public function testCreate3DHashFor3DPay(): void
             'failUrl'   => 'https://domain.com/fail_url',
             'rnd'       => 'rand',
         ];
-        $expected = 'TN+2/D8lijFd+5zAUar6SH6EiRY=';
+        $expected = 'S7UxUAohxaxzl35WxHyDfuQx0sg=';
 
         $actual = $this->crypt->create3DHash($this->account, $requestData);
         $this->assertEquals($expected, $actual);