diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9a93b99..6985bbe 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -13,7 +13,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v3
         with:
-          node-version: 16
+          node-version: 20
           cache: 'npm'
       - run: npm ci
       - run: npm run build
diff --git a/action.yml b/action.yml
index 3f021d9..5ea8020 100644
--- a/action.yml
+++ b/action.yml
@@ -6,7 +6,7 @@ inputs:
     description: 'A token for the repository'
     default: ${{ github.token }}
 runs:
-  using: 'node16'
+  using: 'node20'
   main: 'dist/index.js'
 branding:
   icon: 'user-plus'
diff --git a/package.json b/package.json
index 15e1f26..1133524 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,9 @@
   "bugs": {
     "url": "https://github.com/toshimaru/auto-author-assign/issues"
   },
+  "engines": {
+    "node": ">=20"
+  },
   "homepage": "https://github.com/toshimaru/auto-author-assign#readme",
   "funding": "https://github.com/sponsors/toshimaru",
   "dependencies": {