diff --git a/src/Formatters/NumberFormatter.php b/src/Formatters/NumberFormatter.php
new file mode 100644
index 0000000..45fd6de
--- /dev/null
+++ b/src/Formatters/NumberFormatter.php
@@ -0,0 +1,34 @@
+<?php
+
+/**
+ * This file is part of web3.php package.
+ * 
+ * (c) Kuan-Cheng,Lai <alk03073135@gmail.com>
+ * 
+ * @author Peter Lai <alk03073135@gmail.com>
+ * @license MIT
+ */
+
+namespace Web3\Formatters;
+
+use InvalidArgumentException;
+use Web3\Utils;
+use Web3\Formatters\IFormatter;
+
+class NumberFormatter implements IFormatter
+{
+    /**
+     * format
+     * 
+     * @param mixed $value
+     * @return int
+     */
+    public static function format($value)
+    {
+        $value = Utils::toString($value);
+        $bn = Utils::toBn($value);
+        $int = (int) $bn->toString();
+
+        return $int;
+    }
+}
\ No newline at end of file
diff --git a/src/Methods/EthMethod.php b/src/Methods/EthMethod.php
index ca11ce7..593b381 100644
--- a/src/Methods/EthMethod.php
+++ b/src/Methods/EthMethod.php
@@ -84,7 +84,7 @@ class EthMethod extends JSONRPC implements IMethod
      * @param array $params
      * @return bool
      */
-    public function validate($params)
+    public function validate(&$params)
     {
         if (!is_array($params)) {
             throw new InvalidArgumentException('Please use array params when call validate.');
@@ -147,22 +147,22 @@ class EthMethod extends JSONRPC implements IMethod
         if (!is_array($rules)) {
             throw new InvalidArgumentException('Please use array rules when call transform.');
         }
-        if (count($params) < count($rules)) {
-            if (!isset($this->defaultValues) || empty($this->defaultValues)) {
-                throw new \InvalidArgumentException('The params are less than inputFormatters.');
-            }
-            $defaultValues = $this->defaultValues;
+        // $defaultValues = $this->defaultValues;
 
-            foreach ($defaultValues as $key => $value) {
-                if (!isset($params[$key])) {
-                    $params[$key] = $value;
-                }
-
-            }
-        }
         foreach ($params as $key => $param) {
             if (isset($rules[$key])) {
-                $params[$key] = call_user_func([$rules[$key], 'format'], $param);
+                $formatted = call_user_func([$rules[$key], 'format'], $param);
+
+                // if (is_int($formatted)) {
+                //     if ($formatted >= 0) {
+                //         $params[$key] = $formatted;
+                //     } elseif (isset($defaultValues[$key])) {
+                //         $params[$key] = $defaultValues[$key];
+                //     }
+                // } else {
+                //     $params[$key] = $formatted;
+                // }
+                $params[$key] = $formatted;
             }
         }
         return $params;
diff --git a/src/Methods/Personal/UnlockAccount.php b/src/Methods/Personal/UnlockAccount.php
index 0e2155d..a28143b 100644
--- a/src/Methods/Personal/UnlockAccount.php
+++ b/src/Methods/Personal/UnlockAccount.php
@@ -18,7 +18,7 @@ use Web3\Validators\StringValidator;
 use Web3\Validators\QuantityValidator;
 use Web3\Formatters\AddressFormatter;
 use Web3\Formatters\StringFormatter;
-use Web3\Formatters\QuantityFormatter;
+use Web3\Formatters\NumberFormatter;
 
 class UnlockAccount extends EthMethod
 {
@@ -37,7 +37,7 @@ class UnlockAccount extends EthMethod
      * @var array
      */
     protected $inputFormatters = [
-        AddressFormatter::class, StringFormatter::class, QuantityFormatter::class
+        AddressFormatter::class, StringFormatter::class, NumberFormatter::class
     ];
 
     /**
diff --git a/test/unit/PersonalApiTest.php b/test/unit/PersonalApiTest.php
index 9924b0a..a082f8b 100644
--- a/test/unit/PersonalApiTest.php
+++ b/test/unit/PersonalApiTest.php
@@ -88,8 +88,33 @@ class PersonalApiTest extends TestCase
 
         $personal->unlockAccount($this->newAccount, '123456', function ($err, $unlocked) {
             if ($err !== null) {
-                // infura banned us to use unlock account
-                return $this->assertTrue($err->getCode() === 405);
+                return $this->fail($err->getMessage());
+            }
+            $this->assertTrue($unlocked);
+        });
+    }
+
+    /**
+     * testUnlockAccountWithDuration
+     * 
+     * @return void
+     */
+    public function testUnlockAccountWithDuration()
+    {
+        $personal = $this->personal;
+
+        // create account
+        $personal->newAccount('123456', function ($err, $account) {
+            if ($err !== null) {
+                return $this->fail($e->getMessage());
+            }
+            $this->newAccount = $account;
+            $this->assertTrue(is_string($account));
+        });
+
+        $personal->unlockAccount($this->newAccount, '123456', 100, function ($err, $unlocked) {
+            if ($err !== null) {
+                return $this->fail($err->getMessage());
             }
             $this->assertTrue($unlocked);
         });