diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 6a82b18..346585c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -10,11 +10,11 @@ jobs:
       fail-fast: false
       matrix:
         node-version:
+          - 20
           - 18
-          - 16
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install
diff --git a/index.js b/index.js
index c1be212..efa0960 100644
--- a/index.js
+++ b/index.js
@@ -39,13 +39,7 @@ export function parsePackage(packageFile, {normalize = true} = {}) {
 		throw new TypeError('`packageFile` should be either an `object` or a `string`.');
 	}
 
-	// Input should not be modified - if `structuredClone` is available, do a deep clone, shallow otherwise
-	// TODO: Remove shallow clone when targeting Node.js 18
-	const clonedPackageFile = isObject
-		? (globalThis.structuredClone === undefined
-			? {...packageFile}
-			: structuredClone(packageFile))
-		: packageFile;
+	const clonedPackageFile = isObject ? structuredClone(packageFile) : packageFile;
 
 	return _readPackage(clonedPackageFile, normalize);
 }
diff --git a/package.json b/package.json
index f7cd94f..0bc0649 100644
--- a/package.json
+++ b/package.json
@@ -11,9 +11,12 @@
 		"url": "https://sindresorhus.com"
 	},
 	"type": "module",
-	"exports": "./index.js",
+	"exports": {
+		"types": "./index.d.ts",
+		"default": "./index.js"
+	},
 	"engines": {
-		"node": ">=16"
+		"node": ">=18"
 	},
 	"scripts": {
 		"test": "xo && tsd && cd test && ava"
@@ -34,14 +37,14 @@
 		"normalize"
 	],
 	"dependencies": {
-		"@types/normalize-package-data": "^2.4.1",
+		"@types/normalize-package-data": "^2.4.3",
 		"normalize-package-data": "^6.0.0",
-		"parse-json": "^7.0.0",
-		"type-fest": "^4.2.0"
+		"parse-json": "^8.0.0",
+		"type-fest": "^4.6.0"
 	},
 	"devDependencies": {
 		"ava": "^5.3.1",
-		"tsd": "^0.28.1",
+		"tsd": "^0.29.0",
 		"xo": "^0.56.0"
 	}
 }
diff --git a/readme.md b/readme.md
index bd62aa5..e62ff0c 100644
--- a/readme.md
+++ b/readme.md
@@ -57,8 +57,6 @@ Default: `true`
 
 Parses an object or string into JSON.
 
-Note: `packageFile` is cloned using [`structuredClone`](https://developer.mozilla.org/en-US/docs/Web/API/structuredClone) to prevent modification to the input object. This function is available from Node.js 18 on. In environments without `structuredClone` (such as Node.js 16), a shallow spread is used instead, which can cause deep properties of the object to be modified. Consider cloning the object before using `parsePackage` if that's the case.
-
 #### packageFile
 
 Type: `object | string`