diff --git a/client/client/client.gen.ts b/client/client/client.gen.ts
index d2e55a1..14dc0a0 100644
--- a/client/client/client.gen.ts
+++ b/client/client/client.gen.ts
@@ -37,7 +37,7 @@ export const createClient = (config: Config = {}): Client => {
       ...options,
       fetch: options.fetch ?? _config.fetch ?? globalThis.fetch,
       headers: mergeHeaders(_config.headers, options.headers),
-      serializedBody: undefined,
+      serializedBody: undefined as string | undefined,
     };
 
     if (opts.security) {
@@ -52,7 +52,7 @@ export const createClient = (config: Config = {}): Client => {
     }
 
     if (opts.body !== undefined && opts.bodySerializer) {
-      opts.serializedBody = opts.bodySerializer(opts.body);
+      opts.serializedBody = opts.bodySerializer(opts.body) as string | undefined;
     }
 
     // remove Content-Type header if body is empty to avoid sending invalid requests
@@ -258,8 +258,10 @@ export const createClient = (config: Config = {}): Client => {
     });
   };
 
+  const _buildUrl: Client['buildUrl'] = (options) => buildUrl({ ..._config, ...options });
+
   return {
-    buildUrl,
+    buildUrl: _buildUrl,
     connect: makeMethodFn('CONNECT'),
     delete: makeMethodFn('DELETE'),
     get: makeMethodFn('GET'),
diff --git a/client/core/bodySerializer.gen.ts b/client/core/bodySerializer.gen.ts
index 8ad92c9..67daca6 100644
--- a/client/core/bodySerializer.gen.ts
+++ b/client/core/bodySerializer.gen.ts
@@ -4,7 +4,7 @@ import type { ArrayStyle, ObjectStyle, SerializerOptions } from './pathSerialize
 
 export type QuerySerializer = (query: Record<string, unknown>) => string;
 
-export type BodySerializer = (body: any) => any;
+export type BodySerializer = (body: unknown) => unknown;
 
 type QuerySerializerOptionsObject = {
   allowReserved?: boolean;
@@ -39,12 +39,10 @@ const serializeUrlSearchParamsPair = (data: URLSearchParams, key: string, value:
 };
 
 export const formDataBodySerializer = {
-  bodySerializer: <T extends Record<string, any> | Array<Record<string, any>>>(
-    body: T,
-  ): FormData => {
+  bodySerializer: (body: unknown): FormData => {
     const data = new FormData();
 
-    Object.entries(body).forEach(([key, value]) => {
+    Object.entries(body as Record<string, unknown>).forEach(([key, value]) => {
       if (value === undefined || value === null) {
         return;
       }
@@ -60,15 +58,15 @@ export const formDataBodySerializer = {
 };
 
 export const jsonBodySerializer = {
-  bodySerializer: <T>(body: T): string =>
+  bodySerializer: (body: unknown): string =>
     JSON.stringify(body, (_key, value) => (typeof value === 'bigint' ? value.toString() : value)),
 };
 
 export const urlSearchParamsBodySerializer = {
-  bodySerializer: <T extends Record<string, any> | Array<Record<string, any>>>(body: T): string => {
+  bodySerializer: (body: unknown): string => {
     const data = new URLSearchParams();
 
-    Object.entries(body).forEach(([key, value]) => {
+    Object.entries(body as Record<string, unknown>).forEach(([key, value]) => {
       if (value === undefined || value === null) {
         return;
       }
diff --git a/client/core/params.gen.ts b/client/core/params.gen.ts
index 6099cab..7955601 100644
--- a/client/core/params.gen.ts
+++ b/client/core/params.gen.ts
@@ -96,7 +96,7 @@ interface Params {
 
 const stripEmptySlots = (params: Params) => {
   for (const [slot, value] of Object.entries(params)) {
-    if (value && typeof value === 'object' && !Object.keys(value).length) {
+    if (value && typeof value === 'object' && !Array.isArray(value) && !Object.keys(value).length) {
       delete params[slot as Slot];
     }
   }
diff --git a/client/sdk.gen.ts b/client/sdk.gen.ts
index 91d5ba7..4e76fe5 100644
--- a/client/sdk.gen.ts
+++ b/client/sdk.gen.ts
@@ -29,6 +29,8 @@ export const getAllPaymentMethods = <ThrowOnError extends boolean = false>(optio
 
 /**
  * Create Payment Method
+ *
+ * **このエンドポイントはテストモードでのみ使用できます。**
  */
 export const createPaymentMethod = <ThrowOnError extends boolean = false>(options: Options<CreatePaymentMethodData, ThrowOnError>) => (options.client ?? client).post<CreatePaymentMethodResponses, CreatePaymentMethodErrors, ThrowOnError>({
     security: [{ scheme: 'basic', type: 'http' }, { scheme: 'bearer', type: 'http' }],
diff --git a/client/types.gen.ts b/client/types.gen.ts
index ea95700..230d4d6 100644
--- a/client/types.gen.ts
+++ b/client/types.gen.ts
@@ -3025,6 +3025,12 @@ export type ProductDetailsResponse = {
      * 商品 ID
      */
     id: string;
+    /**
+     * Livemode
+     *
+     * 本番環境かどうか
+     */
+    livemode: boolean;
     /**
      * Name
      *
@@ -3061,6 +3067,18 @@ export type ProductDetailsResponse = {
      * この製品の公開されているウェブページの URL
      */
     url: string | null;
+    /**
+     * Created At
+     *
+     * 作成日時 (UTC, ISO 8601 形式)
+     */
+    created_at: string;
+    /**
+     * Updated At
+     *
+     * 更新日時 (UTC, ISO 8601 形式)
+     */
+    updated_at: string;
 };
 
 /**
@@ -3679,6 +3697,12 @@ export type TaxRateDetailsResponse = {
      * 税率 ID
      */
     id: string;
+    /**
+     * Livemode
+     *
+     * 本番環境かどうか
+     */
+    livemode: boolean;
     /**
      * Display Name
      *
@@ -3713,6 +3737,18 @@ export type TaxRateDetailsResponse = {
      * 説明。管理画面内のみで表示され、顧客には表示されません。
      */
     description: string | null;
+    /**
+     * Created At
+     *
+     * 作成日時 (UTC, ISO 8601 形式)
+     */
+    created_at: string;
+    /**
+     * Updated At
+     *
+     * 更新日時 (UTC, ISO 8601 形式)
+     */
+    updated_at: string;
     /**
      * Metadata
      *
@@ -5887,6 +5923,18 @@ export type GetAllTaxRatesData = {
          * このIDより前のデータを取得
          */
         ending_before?: string;
+        /**
+         * Active
+         *
+         * この税率が有効であるかどうか。無効にした場合でも、すでに設定されている定期課金などでは使用可能です。
+         */
+        active?: boolean | null;
+        /**
+         * Inclusive
+         *
+         * 税込みかどうか。税込 = `true` 税抜 = `false`
+         */
+        inclusive?: boolean | null;
     };
     url: '/v2/tax_rates';
 };
diff --git a/package.json b/package.json
index d178ee0..57a5fcd 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@payjp/payjpv2",
-  "version": "1.0.6",
+  "version": "1.0.7",
   "type": "module",
   "main": "dist/index.cjs",
   "module": "dist/index.mjs",
diff --git a/payjpv2.ts b/payjpv2.ts
index 37c3f8d..14a4d4f 100644
--- a/payjpv2.ts
+++ b/payjpv2.ts
@@ -5,7 +5,7 @@ import {
   type Client,
 } from "./client/client";
 
-const BINDINGS_VERSION = '1.0.6';
+const BINDINGS_VERSION = '1.0.7';
 const DEFAULT_BASE_URL = "https://api.pay.jp";
 
 export interface ClientConfig {