diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0db771a..bc7109a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -5,17 +5,16 @@ on: pull_request
 jobs:
   build:
     runs-on: ${{ matrix.os }}
-
     strategy:
       matrix:
         node:
           - 18
           - 20
+          - 21
         os:
           - ubuntu-latest
           - windows-latest
           - macos-latest
-
     steps:
       - uses: actions/checkout@v2
       - name: Use Node.js ${{ matrix.node }}
diff --git a/package-lock.json b/package-lock.json
index 0305c32..628d938 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19,7 +19,7 @@
         "typescript": "^5.0.4"
       },
       "engines": {
-        "node": "18 || 20"
+        "node": "18 || 20 || 21"
       },
       "funding": {
         "type": "patreon",
diff --git a/package.json b/package.json
index 2b1d341..75f6eff 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
     "fmt": "prettier --write \"**/*.js\" \"**/*.json\" \"**/*.md\" \".*rc\""
   },
   "engines": {
-    "node": "18 || 20"
+    "node": "18 || 20 || 21"
   },
   "readmeFilename": "README.md",
   "devDependencies": {