diff --git a/app/[docs_id]/page.tsx b/app/[docs_id]/page.tsx
index 2841b68..59202da 100644
--- a/app/[docs_id]/page.tsx
+++ b/app/[docs_id]/page.tsx
@@ -3,7 +3,6 @@ import { getCloudflareContext } from "@opennextjs/cloudflare";
 import { readFile } from "node:fs/promises";
 import { join } from "node:path";
 import { MarkdownSection, splitMarkdown } from "./splitMarkdown";
-import pyodideLock from "pyodide/pyodide-lock.json";
 import { PageContent } from "./pageContent";
 import { ChatHistoryProvider } from "./chatHistory";
 import { getChatFromCache } from "@/lib/chatHistory";
@@ -39,12 +38,6 @@ export default async function Page({
         notFound();
       });
   }
-  mdContent = mdContent.then((text) =>
-    text.replaceAll(
-      "{process.env.PYODIDE_PYTHON_VERSION}",
-      String(pyodideLock.info.python)
-    )
-  );
 
   const splitMdContent: Promise<MarkdownSection[]> = mdContent.then((text) =>
     splitMarkdown(text)
diff --git a/app/terminal/python/runtime.tsx b/app/terminal/python/runtime.tsx
index a7eb4b2..84996af 100644
--- a/app/terminal/python/runtime.tsx
+++ b/app/terminal/python/runtime.tsx
@@ -27,7 +27,7 @@ export function usePyodide(): RuntimeContext {
 type MessageToWorker =
   | {
       type: "init";
-      payload: { PYODIDE_CDN: string; interruptBuffer: Uint8Array };
+      payload: { interruptBuffer: Uint8Array };
     }
   | {
       type: "runPython";
@@ -90,11 +90,9 @@ export function PyodideProvider({ children }: { children: ReactNode }) {
       }
     };
 
-    // next.config.ts 内でpyodideをimportし、バージョンを取得している
-    const PYODIDE_CDN = `https://cdn.jsdelivr.net/pyodide/v${process.env.PYODIDE_VERSION}/full/`;
     postMessage<InitPayloadFromWorker>({
       type: "init",
-      payload: { PYODIDE_CDN, interruptBuffer: interruptBuffer.current },
+      payload: { interruptBuffer: interruptBuffer.current },
     }).then(({ success }) => {
       if (success) {
         setReady(true);
diff --git a/next.config.ts b/next.config.ts
index 8ec6405..d0cf482 100644
--- a/next.config.ts
+++ b/next.config.ts
@@ -1,6 +1,5 @@
 import type { NextConfig } from "next";
 import { initOpenNextCloudflareForDev } from "@opennextjs/cloudflare";
-import { version as pyodideVersion } from "pyodide";
 
 initOpenNextCloudflareForDev();
 
@@ -12,9 +11,6 @@ const nextConfig: NextConfig = {
   typescript: {
     ignoreBuildErrors: true,
   },
-  env: {
-    PYODIDE_VERSION: pyodideVersion,
-  },
   serverExternalPackages: ["@prisma/client", ".prisma/client"],
   async headers() {
     // pyodideをworkerで動作させるために必要
diff --git a/package-lock.json b/package-lock.json
index 403fe39..e517bfa 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -24,7 +24,6 @@
         "next": "<15.5",
         "pg": "^8.16.3",
         "prismjs": "^1.30.0",
-        "pyodide": "^0.28.1",
         "react": "19.1.0",
         "react-ace": "^14.0.1",
         "react-dom": "19.1.0",
@@ -19793,18 +19792,6 @@
         "node": ">=16.0.0"
       }
     },
-    "node_modules/pyodide": {
-      "version": "0.28.1",
-      "resolved": "https://registry.npmjs.org/pyodide/-/pyodide-0.28.1.tgz",
-      "integrity": "sha512-7O1jZdfUc4/9PAKzEIyLOh3yhxknTWA8xQaCfZ4R56pOnchS909x2sqt2Wh+qHf+b7MzyB8igE5ZzYdP1pZN5w==",
-      "license": "MPL-2.0",
-      "dependencies": {
-        "ws": "^8.5.0"
-      },
-      "engines": {
-        "node": ">=18.0.0"
-      }
-    },
     "node_modules/qs": {
       "version": "6.13.0",
       "resolved": "https://registry.npmjs.org/qs/-/qs-6.13.0.tgz",
diff --git a/package.json b/package.json
index 799139b..8cf82dd 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,6 @@
     "next": "<15.5",
     "pg": "^8.16.3",
     "prismjs": "^1.30.0",
-    "pyodide": "^0.28.1",
     "react": "19.1.0",
     "react-ace": "^14.0.1",
     "react-dom": "19.1.0",
diff --git a/public/docs/python-1.md b/public/docs/python-1.md
index bd00a1b..0990183 100644
--- a/public/docs/python-1.md
+++ b/public/docs/python-1.md
@@ -33,7 +33,7 @@ macOSでは、**Homebrew** というパッケージマネージャを使って
 
 ### ブラウザで今すぐ試す
 
-このウェブサイトではドキュメント内に Python {process.env.PYODIDE_PYTHON_VERSION} の実行環境を埋め込んでいます。
+このウェブサイトではドキュメント内にPython3の実行環境を埋め込んでいます。
 以下のように青枠で囲われたコード例には自由にPythonコードを書いて試すことができます。気軽に利用してください。
 
 ```python-repl:1
diff --git a/public/pyodide.worker.js b/public/pyodide.worker.js
index 2f0a047..2d6a714 100644
--- a/public/pyodide.worker.js
+++ b/public/pyodide.worker.js
@@ -1,6 +1,7 @@
 // Pyodide web worker
 let pyodide;
 let pyodideOutput = [];
+const PYODIDE_CDN = `https://cdn.jsdelivr.net/pyodide/v0.28.1/full/`;
 
 // Helper function to read all files from the Pyodide file system
 function readAllFiles() {
@@ -19,7 +20,7 @@ function readAllFiles() {
 }
 
 async function init(id, payload) {
-  const { PYODIDE_CDN, interruptBuffer } = payload;
+  const { interruptBuffer } = payload;
   if (!pyodide) {
     importScripts(`${PYODIDE_CDN}pyodide.js`);
     pyodide = await loadPyodide({