diff --git a/README.md b/README.md
index 57ad3d3..37e9cd9 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ A PHP client library for the PAY.JP v2 API. This SDK provides a convenient way t
 This PHP package is automatically generated by the [OpenAPI Generator](https://openapi-generator.tech) project:
 
 - API version: `2.0.0`
-- Package version: `1.0.1`
+- Package version: `1.0.4`
 - Generator version: `7.14.0`
 - Build package: `org.openapitools.codegen.languages.PhpClientCodegen`
 
@@ -300,6 +300,6 @@ vendor/bin/phpunit
 This PHP package is automatically generated by the [OpenAPI Generator](https://openapi-generator.tech) project:
 
 - API version: `2.0.0`
-- Package version: `1.0.1`
+- Package version: `1.0.4`
 - Generator version: `7.14.0`
 - Build package: `org.openapitools.codegen.languages.PhpClientCodegen`
diff --git a/lib/Configuration.php b/lib/Configuration.php
index a62babf..7eaf0a1 100644
--- a/lib/Configuration.php
+++ b/lib/Configuration.php
@@ -101,7 +101,7 @@ class Configuration
      *
      * @var string
      */
-    protected $userAgent = 'payjp/payjpv2 PHPBindings/1.0.1';
+    protected $userAgent = 'payjp/payjpv2 PHPBindings/1.0.4';
 
     /**
      * Debug switch (default set to false)
@@ -339,7 +339,7 @@ public function getUserAgent(): string
     public static function buildClientUserAgent(): string
     {
         $uaInfo = [
-            'bindings_version' => '1.0.1',
+            'bindings_version' => '1.0.4',
             'lang' => 'php',
             'lang_version' => PHP_VERSION,
             'publisher' => 'payjp',
@@ -458,7 +458,7 @@ public static function toDebugReport()
         $report .= '    OS: ' . php_uname() . PHP_EOL;
         $report .= '    PHP Version: ' . PHP_VERSION . PHP_EOL;
         $report .= '    The version of the OpenAPI document: 2.0.0' . PHP_EOL;
-        $report .= '    SDK Package Version: 1.0.1' . PHP_EOL;
+        $report .= '    SDK Package Version: 1.0.4' . PHP_EOL;
         $report .= '    Temp Folder Path: ' . self::getDefaultConfiguration()->getTempFolderPath() . PHP_EOL;
 
         return $report;