diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 13e0c84..76c4b46 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,11 +18,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node: ['20', '22']
+        node: ['22', '24', '26']
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v7
         with:
           node-version: ${{ matrix.node }}
           cache: npm
diff --git a/.github/workflows/commitlint.yml b/.github/workflows/commitlint.yml
index 74354bc..7b0e22a 100644
--- a/.github/workflows/commitlint.yml
+++ b/.github/workflows/commitlint.yml
@@ -15,13 +15,13 @@ jobs:
     name: conventional commit lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0
 
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v7
         with:
-          node-version: '22'
+          node-version: '24'
 
       - name: Install commitlint
         run: npm install -g @commitlint/cli @commitlint/config-conventional
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 58ecb24..3463d3d 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -21,11 +21,11 @@ jobs:
     name: test and build
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v7
         with:
-          node-version: '22'
+          node-version: '24'
           cache: npm
 
       - run: npm ci --no-audit --no-fund
@@ -49,7 +49,7 @@ jobs:
           npm pack --pack-destination out
           ls -la out
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: package
           path: |
@@ -67,14 +67,14 @@ jobs:
       contents: read
       id-token: write   # npm provenance / trusted publishing (OIDC)
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v7
         with:
-          node-version: '22'
+          node-version: '24'
           registry-url: 'https://registry.npmjs.org'
 
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v8
         with:
           name: package
           path: artifact
@@ -111,7 +111,7 @@ jobs:
     permissions:
       contents: write   # create the GitHub release
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0
 
@@ -123,7 +123,7 @@ jobs:
         env:
           OUTPUT: RELEASE_NOTES.md
 
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v8
         with:
           name: package
           path: artifact
@@ -139,7 +139,7 @@ jobs:
           cat RELEASE_NOTES.md
 
       - name: Create GitHub release
-        uses: softprops/action-gh-release@v2
+        uses: softprops/action-gh-release@v3
         with:
           tag_name: ${{ github.ref_name }}
           name: ${{ github.ref_name }}
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 4277e04..6cec13a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -12,7 +12,7 @@ data is outside this repository.
 
 ## Development
 
-Node.js 20 or later. There are no runtime dependencies; the development dependencies are esbuild and TypeScript.
+Node.js 22 or later. There are no runtime dependencies; the development dependencies are esbuild and TypeScript.
 
 ```sh
 npm ci
diff --git a/README.en.md b/README.en.md
index 4917048..ad38751 100644
--- a/README.en.md
+++ b/README.en.md
@@ -214,7 +214,7 @@ Chromium-based browsers.
 
 ## Development
 
-Node.js 20 or later.
+Node.js 22 or later.
 
 ```sh
 npm ci
diff --git a/README.md b/README.md
index 56bb28a..613a45e 100644
--- a/README.md
+++ b/README.md
@@ -169,7 +169,7 @@ nnnotes web out/site --all --all-live2d --all-stories --player <ournotes-player
 
 ## 开发
 
-需要 Node.js 20 或更高版本。
+需要 Node.js 22 或更高版本。
 
 ```sh
 npm ci
diff --git a/docs/data-format.md b/docs/data-format.md
index 09ccd84..ef46dd1 100644
--- a/docs/data-format.md
+++ b/docs/data-format.md
@@ -652,5 +652,5 @@ references, one Lit material and a texture descriptor per drawable), the drawabl
 `_ADDITIONAL_LIGHTS_VERTEX` required from `model.json` format 2), and that the manifest lists exactly the files the
 viewer and the story player read.
 
-It needs Node.js 20 or later and no dependencies. The opt-in data tests (`OURNOTES_DATA=<site dir> npm run test:data`)
+It needs Node.js 22 or later and no dependencies. The opt-in data tests (`OURNOTES_DATA=<site dir> npm run test:data`)
 go further and run charts through the player in Node (see [CONTRIBUTING.md](../CONTRIBUTING.md)).
diff --git a/package-lock.json b/package-lock.json
index d137cb5..fc8f4e0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,7 +13,7 @@
         "typescript": "5.9.3"
       },
       "engines": {
-        "node": ">=20"
+        "node": ">=22"
       }
     },
     "node_modules/@esbuild/aix-ppc64": {
diff --git a/package.json b/package.json
index d7061ce..0d9878f 100644
--- a/package.json
+++ b/package.json
@@ -84,7 +84,7 @@
     "LICENSE-EXCEPTION"
   ],
   "engines": {
-    "node": ">=20"
+    "node": ">=22"
   },
   "scripts": {
     "build": "node scripts/build.mjs",