diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ed69877..8203803 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -53,7 +53,7 @@ jobs:
       - name: Install
         run: nci
 
-      - name: Lint
+      - name: Typecheck
         run: nr typecheck
 
   test:
diff --git a/package.json b/package.json
index 606a5ba..cc6d66d 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,6 @@
     "url": "git+https://github.com/antfu/[name].git"
   },
   "funding": "https://github.com/sponsors/antfu",
-  "sideEffects": false,
   "main": "./dist/index.cjs",
   "module": "./dist/index.mjs",
   "types": "./dist/index.d.ts",
@@ -29,6 +28,7 @@
   "files": [
     "dist"
   ],
+  "sideEffects": false,
   "scripts": {
     "build": "rimraf dist && unbuild",
     "dev": "unbuild --stub",
@@ -42,6 +42,7 @@
   "devDependencies": {
     "@antfu/eslint-config": "^0.18.8",
     "@antfu/ni": "^0.13.2",
+    "@babel/types": "^7.17.0",
     "@types/node": "^17.0.21",
     "bumpp": "^7.1.1",
     "eslint": "^8.11.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index cb6610d..f4c6187 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -6,6 +6,7 @@ importers:
     specifiers:
       '@antfu/eslint-config': ^0.18.8
       '@antfu/ni': ^0.13.2
+      '@babel/types': ^7.17.0
       '@types/node': ^17.0.21
       bumpp: ^7.1.1
       eslint: ^8.11.0
@@ -19,6 +20,7 @@ importers:
     devDependencies:
       '@antfu/eslint-config': 0.18.8_eslint@8.11.0+typescript@4.6.2
       '@antfu/ni': 0.13.2
+      '@babel/types': 7.17.0
       '@types/node': 17.0.21
       bumpp: 7.1.1
       eslint: 8.11.0
@@ -148,6 +150,14 @@ packages:
       js-tokens: 4.0.0
     dev: true
 
+  /@babel/types/7.17.0:
+    resolution: {integrity: sha512-TmKSNO4D5rzhL5bjWFcVHHLETzfQ/AmbKpKPOSjlP0WoHZ6L911fgoOKY4Alp/emzG4cHJdyN49zpgkbXFEHHw==}
+    engines: {node: '>=6.9.0'}
+    dependencies:
+      '@babel/helper-validator-identifier': 7.16.7
+      to-fast-properties: 2.0.0
+    dev: true
+
   /@eslint/eslintrc/1.2.1:
     resolution: {integrity: sha512-bxvbYnBPN1Gibwyp6NrpnFzA3YtRL3BBAyEAFVIpNTm2Rn4Vy87GA5M4aSn3InRrlsbX5N0GW7XIx+U4SAEKdQ==}
     engines: {node: ^12.22.0 || ^14.17.0 || >=16.0.0}
@@ -3241,6 +3251,11 @@ packages:
     engines: {node: '>=14.0.0'}
     dev: true
 
+  /to-fast-properties/2.0.0:
+    resolution: {integrity: sha1-3F5pjL0HkmW8c+A3doGk5Og/YW4=}
+    engines: {node: '>=4'}
+    dev: true
+
   /to-regex-range/5.0.1:
     resolution: {integrity: sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==}
     engines: {node: '>=8.0'}
diff --git a/tsconfig.json b/tsconfig.json
index 772d665..e417360 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -8,6 +8,7 @@
     "strict": true,
     "strictNullChecks": true,
     "resolveJsonModule": true,
+    "skipLibCheck": true,
     "skipDefaultLibCheck": true
   }
 }