diff --git a/src/Formatters/Boolean.php b/src/Formatters/Boolean.php
deleted file mode 100644
index 652190e..0000000
--- a/src/Formatters/Boolean.php
+++ /dev/null
@@ -1,33 +0,0 @@
-<?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 Boolean implements IFormatter
-{
-    /**
-     * format
-     * 
-     * @param mixed $value
-     * @return int
-     */
-    public static function format($value)
-    {
-        if (!is_bool($value)) {
-            throw new InvalidArgumentException('The value to inputFormat function must be boolean.');
-        }
-        return (int) $value;
-    }
-}
\ No newline at end of file
diff --git a/test/unit/BooleanFormatterTest.php b/test/unit/BooleanFormatterTest.php
index f5dff3b..2522092 100644
--- a/test/unit/BooleanFormatterTest.php
+++ b/test/unit/BooleanFormatterTest.php
@@ -3,7 +3,7 @@
 namespace Test\Unit;
 
 use Test\TestCase;
-use Web3\Formatters\Boolean;
+use Web3\Formatters\BooleanFormatter;
 
 class BooleanFormatterTest extends TestCase
 {
@@ -22,7 +22,7 @@ class BooleanFormatterTest extends TestCase
     public function setUp()
     {
         parent::setUp();
-        $this->formatter = new Boolean;
+        $this->formatter = new BooleanFormatter;
     }
 
     /**