diff --git a/src/Library/Encryption/Algorithm/KeyEncryption/AbstractECDH.php b/src/Library/Encryption/Algorithm/KeyEncryption/AbstractECDH.php
index 24600124..04d5b6e1 100644
--- a/src/Library/Encryption/Algorithm/KeyEncryption/AbstractECDH.php
+++ b/src/Library/Encryption/Algorithm/KeyEncryption/AbstractECDH.php
@@ -89,7 +89,7 @@ protected function calculateAgreementKey(JWK $private_key, JWK $public_key): str
                         $publicPem = ECKey::convertPublicKeyToPEM($public_key);
                         $privatePem = ECKey::convertPrivateKeyToPEM($private_key);
 
-                        $res = openssl_pkey_derive($publicPem, $privatePem, $curve->getSize());
+                        $res = openssl_pkey_derive($publicPem, $privatePem);
                         if ($res === false) {
                             throw new RuntimeException('Unable to derive the key');
                         }
diff --git a/tests/EncryptionAlgorithm/ContentEncryption/AESCBC/AESCBC_HSContentEncryptionTest.php b/tests/EncryptionAlgorithm/ContentEncryption/AESCBC/AESCBC_HSContentEncryptionTest.php
index 3eab015c..547b6c46 100644
--- a/tests/EncryptionAlgorithm/ContentEncryption/AESCBC/AESCBC_HSContentEncryptionTest.php
+++ b/tests/EncryptionAlgorithm/ContentEncryption/AESCBC/AESCBC_HSContentEncryptionTest.php
@@ -320,10 +320,8 @@ public function a256CBCHS512EncryptAndDecrypt(): void
     protected static function getMethod(string $class, string $name): ReflectionMethod
     {
         $class = new ReflectionClass($class);
-        $method = $class->getMethod($name);
-        $method->setAccessible(true);
 
-        return $method;
+        return $class->getMethod($name);
     }
 
     private function convertArrayToBinString(array $data): string