diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6226652..66c1e4d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,7 +9,7 @@ jobs:
         os: [ubuntu-latest, macos-latest]
         node: ["18", "20", "21"]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Setup Node.js v${{ matrix.node }}
         uses: actions/setup-node@v3
         with:
diff --git a/changelog.md b/changelog.md
index c39cd00..fbe6b5b 100644
--- a/changelog.md
+++ b/changelog.md
@@ -68,7 +68,7 @@
 - Removed the [`jsdoc-md`](https://npm.im/jsdoc-md) dev dependency and the related package scripts, replacing the readme “API” section with a manually written “Exports” section.
 - Updated GitHub Actions CI config:
   - Run tests with Node.js v18, v20, v21.
-  - Updated `actions/checkout` to v3.
+  - Updated `actions/checkout` to v4.
   - Updated `actions/setup-node` to v3.
 - Use the `node:` URL scheme for Node.js builtin module imports.
 - Reorganized the test file structure.