diff --git a/.github/workflows/build-test.yml b/.github/workflows/build-test.yml
index cab2056..30a5584 100644
--- a/.github/workflows/build-test.yml
+++ b/.github/workflows/build-test.yml
@@ -11,13 +11,13 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        version: [16, 18]
+        version: [18, 20]
     steps:
       - name: Setup node
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.version }}
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install deps
         run: npm ci
       - name: Check Types
diff --git a/.github/workflows/deploy-pages.yml b/.github/workflows/deploy-pages.yml
index af51148..b418334 100644
--- a/.github/workflows/deploy-pages.yml
+++ b/.github/workflows/deploy-pages.yml
@@ -8,11 +8,11 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Setup node
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
-          node-version: "18.x"
+          node-version: 20
       - name: Install deps
         run: npm ci
       - name: Check Types
@@ -24,7 +24,7 @@ jobs:
       - name: Run tests
         run: npm run test:unit
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_branch: gh-pages
diff --git a/package-lock.json b/package-lock.json
index b012b75..22e0533 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -35,7 +35,7 @@
         "vitest": "^1.5.0"
       },
       "engines": {
-        "node": ">=16.15.0"
+        "node": "^18.0.0 || >=20.0.0"
       },
       "peerDependencies": {
         "svelte": "^3.53.1 || ^4.0.0"
diff --git a/package.json b/package.json
index c497a06..fa3ea16 100644
--- a/package.json
+++ b/package.json
@@ -80,6 +80,6 @@
     "pre-commit": "npm run prettier-staged"
   },
   "engines": {
-    "node": ">=16.15.0"
+    "node": "^18.0.0 || >=20.0.0"
   }
 }