diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e745faec0..fb887c91f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -28,7 +28,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [20.x, 22.x]
+        node-version: [22.x]
 
     steps:
       - name: Check out Git repository
@@ -80,7 +80,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: 22
           check-latest: true
           cache: 'pnpm'
 
@@ -126,7 +126,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: 22
           check-latest: true
           cache: 'pnpm'
 
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 82695ebc2..f435ced3c 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -24,13 +24,13 @@
 - 開発言語
   - [TypeScript](https://www.typescriptlang.org/)
 - JavaScriptのランタイム
-  - [Node.js](https://nodejs.org): v20+
+  - [Node.js](https://nodejs.org): v22.x
 - 汎用フレームワーク
-  - [SvelteKit](https://kit.svelte.dev/)
+  - [SvelteKit](https://kit.svelte.dev/): v5.xに移行予定。
 - UIライブラリ
   - [shadcn-svelte](https://www.shadcn-svelte.com/): 主にData Tableを使用予定。将来的には、以下のライブラリを使って実装している部分を置き換える。
   - [Flowbite Svelte](https://flowbite-svelte.com/)
-  - [STWUI](https://stwui.vercel.app/)
+  - [STWUI](https://stwui.vercel.app/): 開発が事実上終了した可能性が高いため、使用しているコンポーネントを調べて別のライブラリに移行する。
 - テスティングフレームワーク
   - [Vitest](https://vitest.dev/): 単体テスト (ユーティリティ、コンポーネント)
   - [Playwright](https://playwright.dev/): e2eテスト
diff --git a/Dockerfile b/Dockerfile
index 6d3b419db..59deef916 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 # See:
 # https://github.com/devcontainers/images/tree/main/src/javascript-node
-ARG NODE_VERSION=20
+ARG NODE_VERSION=22
 FROM mcr.microsoft.com/devcontainers/javascript-node:${NODE_VERSION}
 
 WORKDIR /usr/src/app
diff --git a/package.json b/package.json
index 01e21e074..8bb723e81 100644
--- a/package.json
+++ b/package.json
@@ -93,5 +93,5 @@
     "vercel": "39.2.2",
     "xss": "1.0.15"
   },
-  "packageManager": "pnpm@9.13.2"
+  "packageManager": "pnpm@9.15.2"
 }
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 543ef8f8c..42a7d0f85 100755
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -5,7 +5,7 @@
 // https://www.prisma.io/docs/concepts/components/prisma-schema/generators
 generator client {
   provider      = "prisma-client-js"
-  binaryTargets = ["native", "rhel-openssl-1.0.x", "rhel-openssl-3.0.x"]
+  binaryTargets = ["native", "rhel-openssl-3.0.x"]
 }
 
 // See:
diff --git a/src/test/lib/utils/time.test.ts b/src/test/lib/utils/time.test.ts
index e282508d5..5d1c4fb76 100644
--- a/src/test/lib/utils/time.test.ts
+++ b/src/test/lib/utils/time.test.ts
@@ -4,11 +4,11 @@ import { delay } from '$lib/utils/time';
 describe('Delay', () => {
   it('expected to be resolved after the specified delay', async () => {
     const start = performance.now();
-    const milliseconds = 80; // Increased threshold for CI environment reliability.
+    const milliseconds = 50; // Increased threshold for CI environment reliability.
     await delay(milliseconds);
     const end = performance.now();
 
-    expect(end - start).toBeGreaterThanOrEqual(milliseconds);
+    expect(end - start).toBeGreaterThanOrEqual(milliseconds - 5); // Extend tolerance.
   });
 
   it('expected to be resolved immediately if the delay duration is zero', async () => {