diff --git a/README.md b/README.md
index a8ea881..ef3ba6a 100644
--- a/README.md
+++ b/README.md
@@ -6,11 +6,8 @@ Source code of [yude.jp](https://yude.jp).\
 Built with [Next.js](https://nextjs.org/) and [Tailwind CSS](https://tailwindcss.com/) and deployed on [Vercel](https://vercel.com).
 
 ## Development
-### Setup
-1. Run `yarn`.
-1. Copy `.env.local.sample` as `.env.local` and set value. 
-### Preview
-* Run `yarn dev`.
+1. Run `yarn` to install dependencies.
+2. Run `yarn dev` to serve.
 
 ## License
 This repository is provided under the MIT License.
diff --git a/package.json b/package.json
index 61a1c0a..da14d5f 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,6 @@
     "autoprefixer": "^10.3.4",
     "axios": "^0.21.4",
     "date-fns": "^2.24.0",
-    "microcms-js-sdk": "^1.2.0",
     "moment": "^2.29.1",
     "next": "^11.1.3",
     "next-export-i18n": "^1.2.1",
diff --git a/pages/posts/[id].js b/pages/posts/[id].js
deleted file mode 100644
index cf4da22..0000000
--- a/pages/posts/[id].js
+++ /dev/null
@@ -1,58 +0,0 @@
-// Base layout
-import Layout from "../components/Layout"
-
-// microCMS library
-import { client } from "../../libs/client";
-
-// next-seo
-import { NextSeo } from 'next-seo';
-
-// React
-import * as React from "react";
-
-// React Moment
-import Moment from 'react-moment';
-
-export default function BlogId({ blog }) {
-  return (
-    <>
-    <Layout title={blog.title + " - yude.jp"}>
-    <NextSeo
-      title={blog.title + " - yude.jp"}
-      description={blog.publishedAt + "に更新された「" + blog.title + "」というタイトルの記事です。"}
-    />
-        <h1>{blog.title}</h1>
-        <p>
-          <Moment format="YYYY/MM/DD HH:mm">
-          {blog.updated}
-          </Moment>
-        </p>
-        <div
-          dangerouslySetInnerHTML={{
-            __html: `${blog.content}`,
-          }}
-        />
-    </Layout>
-    </>
-  );
-}
-
-// Specify path for static generator
-export const getStaticPaths = async () => {
-  const data = await client.get({ endpoint: "blog" });
-
-  const paths = data.contents.map((content) => `/posts/${content.id}`);
-  return { paths, fallback: false };
-};
-
-// Passing data to template
-export const getStaticProps = async (context) => {
-  const id = context.params.id;
-  const data = await client.get({ endpoint: "blog", contentId: id });
-
-  return {
-    props: {
-      blog: data,
-    },
-  };
-};
\ No newline at end of file
diff --git a/yarn.lock b/yarn.lock
index f95d2b1..b1fb1fe 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3090,14 +3090,6 @@ merge2@^1.3.0:
   resolved "https://registry.yarnpkg.com/merge2/-/merge2-1.4.1.tgz#4368892f885e907455a6fd7dc55c0c9d404990ae"
   integrity sha512-8q7VEgMJW4J8tcfVPy8g09NcQwZdbwFEqhe/WZkoIzjn/3TGDwtOCYtXGxA3O8tPzpczCCDgv+P2P5y00ZJOOg==
 
-microcms-js-sdk@^1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/microcms-js-sdk/-/microcms-js-sdk-1.2.0.tgz#ad61d35c849fb7dfdda47fc66df2a4069e2ced9e"
-  integrity sha512-ipjiRb4B2ASI2BoDhmusALn7UV7OXIQ38WSdRUDfekBIk34ZjLplPTYq3XDAqQBtoOgA6mKnY/67YIeO4C4jDw==
-  dependencies:
-    node-fetch "^2.6.1"
-    qs "^6.10.1"
-
 micromark-core-commonmark@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/micromark-core-commonmark/-/micromark-core-commonmark-1.0.1.tgz#a64987cafe872e8b80bc8f2352a5d988586ac4f1"
@@ -3545,13 +3537,6 @@ node-fetch@2.6.1:
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.1.tgz#045bd323631f76ed2e2b55573394416b639a0052"
   integrity sha512-V4aYg89jEoVRxRb2fJdAg8FHvI7cEyYdVAh94HH0UIK8oJxUfkjlDQN9RbMx+bEjP7+ggMiFRprSti032Oipxw==
 
-node-fetch@^2.6.1:
-  version "2.6.4"
-  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.4.tgz#7f1d13b8f9ff0c1a994dc6f73c69f7d652c7ace2"
-  integrity sha512-aD1fO+xtLiSCc9vuD+sYMxpIuQyhHscGSkBEo2o5LTV/3bTEAYvdUii29n8LlO5uLCmWdGP7uVUVXFo5SRdkLA==
-  dependencies:
-    whatwg-url "^5.0.0"
-
 node-html-parser@1.4.9:
   version "1.4.9"
   resolved "https://registry.yarnpkg.com/node-html-parser/-/node-html-parser-1.4.9.tgz#3c8f6cac46479fae5800725edb532e9ae8fd816c"
@@ -4131,13 +4116,6 @@ purgecss@^4.0.3:
     postcss "^8.2.1"
     postcss-selector-parser "^6.0.2"
 
-qs@^6.10.1:
-  version "6.10.1"
-  resolved "https://registry.yarnpkg.com/qs/-/qs-6.10.1.tgz#4931482fa8d647a5aab799c5271d2133b981fb6a"
-  integrity sha512-M528Hph6wsSVOBiYUnGf+K/7w0hNshs/duGsNXPUCLH5XAqjEtiPGwNONLV0tBH8NoGb0mvD5JubnUTrujKDTg==
-  dependencies:
-    side-channel "^1.0.4"
-
 querystring-es3@0.2.1, querystring-es3@^0.2.0:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/querystring-es3/-/querystring-es3-0.2.1.tgz#9ec61f79049875707d69414596fd907a4d711e73"
@@ -5023,11 +5001,6 @@ tr46@^1.0.1:
   dependencies:
     punycode "^2.1.0"
 
-tr46@~0.0.3:
-  version "0.0.3"
-  resolved "https://registry.yarnpkg.com/tr46/-/tr46-0.0.3.tgz#8184fd347dac9cdc185992f3a6622e14b9d9ab6a"
-  integrity sha1-gYT9NH2snNwYWZLzpmIuFLnZq2o=
-
 trough@^2.0.0:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/trough/-/trough-2.0.2.tgz#94a3aa9d5ce379fc561f6244905b3f36b7458d96"
@@ -5298,11 +5271,6 @@ watchpack@^2.2.0:
     glob-to-regexp "^0.4.1"
     graceful-fs "^4.1.2"
 
-webidl-conversions@^3.0.0:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/webidl-conversions/-/webidl-conversions-3.0.1.tgz#24534275e2a7bc6be7bc86611cc16ae0a5654871"
-  integrity sha1-JFNCdeKnvGvnvIZhHMFq4KVlSHE=
-
 webidl-conversions@^4.0.2:
   version "4.0.2"
   resolved "https://registry.yarnpkg.com/webidl-conversions/-/webidl-conversions-4.0.2.tgz#a855980b1f0b6b359ba1d5d9fb39ae941faa63ad"
@@ -5343,14 +5311,6 @@ webpack@^5.53.0:
     watchpack "^2.2.0"
     webpack-sources "^3.2.0"
 
-whatwg-url@^5.0.0:
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/whatwg-url/-/whatwg-url-5.0.0.tgz#966454e8765462e37644d3626f6742ce8b70965d"
-  integrity sha1-lmRU6HZUYuN2RNNib2dCzotwll0=
-  dependencies:
-    tr46 "~0.0.3"
-    webidl-conversions "^3.0.0"
-
 whatwg-url@^7.0.0:
   version "7.1.0"
   resolved "https://registry.yarnpkg.com/whatwg-url/-/whatwg-url-7.1.0.tgz#c2c492f1eca612988efd3d2266be1b9fc6170d06"