diff --git a/README.md b/README.md
index 87885ba..c17e810 100644
--- a/README.md
+++ b/README.md
@@ -18,8 +18,8 @@ USERNAME = "USERNAME"
 PASSWORD = "PASSWORD"
 ```
 
-* USERNAME: The username of WebDav.
-* PASSWORD: The password of WebDav.
+- USERNAME: The username of WebDav.
+- PASSWORD: The password of WebDav.
 
 ## Development
 
diff --git a/package-lock.json b/package-lock.json
index 05fc3c1..f692944 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,6 +9,7 @@
 			"version": "0.0.0",
 			"devDependencies": {
 				"@cloudflare/workers-types": "^4.20231121.0",
+				"prettier": "3.1.1",
 				"typescript": "^5.0.4",
 				"wrangler": "^3.0.0"
 			}
@@ -970,6 +971,21 @@
 				"url": "https://github.com/sponsors/jonschlinkert"
 			}
 		},
+		"node_modules/prettier": {
+			"version": "3.1.1",
+			"resolved": "https://registry.npmjs.org/prettier/-/prettier-3.1.1.tgz",
+			"integrity": "sha512-22UbSzg8luF4UuZtzgiUOfcGM8s4tjBv6dJRT7j275NXsy2jb4aJa4NNveul5x4eqlF1wuhuR2RElK71RvmVaw==",
+			"dev": true,
+			"bin": {
+				"prettier": "bin/prettier.cjs"
+			},
+			"engines": {
+				"node": ">=14"
+			},
+			"funding": {
+				"url": "https://github.com/prettier/prettier?sponsor=1"
+			}
+		},
 		"node_modules/printable-characters": {
 			"version": "1.0.42",
 			"resolved": "https://registry.npmjs.org/printable-characters/-/printable-characters-1.0.42.tgz",
diff --git a/package.json b/package.json
index 88eba47..73171b8 100644
--- a/package.json
+++ b/package.json
@@ -5,10 +5,13 @@
 	"scripts": {
 		"deploy": "wrangler deploy",
 		"dev": "wrangler dev",
-		"start": "wrangler dev"
+		"start": "wrangler dev",
+		"lint-perttier": "prettier . --write",
+		"check-perttier": "prettier . --check"
 	},
 	"devDependencies": {
 		"@cloudflare/workers-types": "^4.20231121.0",
+		"prettier": "3.1.1",
 		"typescript": "^5.0.4",
 		"wrangler": "^3.0.0"
 	},
diff --git a/src/index.ts b/src/index.ts
index 020d50c..6f47fd6 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -46,21 +46,11 @@ async function* listAll(bucket: R2Bucket, prefix: string, isRecursive: boolean =
 		if (r2_objects.truncated) {
 			cursor = r2_objects.cursor;
 		}
-	} while (r2_objects.truncated)
+	} while (r2_objects.truncated);
 }
 
-
-const DAV_CLASS = "1";
-const SUPPORT_METHODS = [
-	"OPTIONS",
-	"PROPFIND",
-	"MKCOL",
-	"GET",
-	"HEAD",
-	"PUT",
-	"COPY",
-	"MOVE",
-];
+const DAV_CLASS = '1';
+const SUPPORT_METHODS = ['OPTIONS', 'PROPFIND', 'MKCOL', 'GET', 'HEAD', 'PUT', 'COPY', 'MOVE'];
 
 type DavProperties = {
 	creationdate: string | undefined;
@@ -71,7 +61,7 @@ type DavProperties = {
 	getetag: string | undefined;
 	getlastmodified: string | undefined;
 	resourcetype: string;
-}
+};
 
 function fromR2Object(object: R2Object | null | undefined): DavProperties {
 	if (object === null || object === undefined) {
@@ -79,11 +69,11 @@ function fromR2Object(object: R2Object | null | undefined): DavProperties {
 			creationdate: new Date().toUTCString(),
 			displayname: undefined,
 			getcontentlanguage: undefined,
-			getcontentlength: "0",
+			getcontentlength: '0',
 			getcontenttype: undefined,
 			getetag: undefined,
 			getlastmodified: new Date().toUTCString(),
-			resourcetype: "<collection />",
+			resourcetype: '<collection />',
 		};
 	}
 
@@ -99,7 +89,6 @@ function fromR2Object(object: R2Object | null | undefined): DavProperties {
 	};
 }
 
-
 function make_resource_path(request: Request): string {
 	let path = new URL(request.url).pathname.slice(1);
 	path = path.endsWith('/') ? path.slice(0, -1) : path;
@@ -110,9 +99,9 @@ async function handle_options(request: Request, bucket: R2Bucket): Promise<Respo
 	return new Response(null, {
 		status: 204,
 		headers: {
-			'DAV': DAV_CLASS,
-			'Allow': SUPPORT_METHODS.join(', '),
-		}
+			DAV: DAV_CLASS,
+			Allow: SUPPORT_METHODS.join(', '),
+		},
 	});
 }
 
@@ -133,7 +122,7 @@ async function handle_get(request: Request, bucket: R2Bucket): Promise<Response>
 		if (resource_path !== '') page += `<a href="../">..</a><br>`;
 		for await (const object of listAll(bucket, resource_path)) {
 			if (object.key === resource_path) {
-				continue
+				continue;
 			}
 			let href = `/${object.key + (object.customMetadata?.resourcetype === '<collection />' ? '/' : '')}`;
 			page += `<a href="${href}">${object.httpMetadata?.contentDisposition ?? object.key}</a><br>`;
@@ -147,12 +136,12 @@ async function handle_get(request: Request, bucket: R2Bucket): Promise<Response>
 
 		let isR2ObjectBody = (object: R2Object | R2ObjectBody): object is R2ObjectBody => {
 			return 'body' in object;
-		}
+		};
 
 		if (object === null) {
 			return new Response('Not Found', { status: 404 });
 		} else if (!isR2ObjectBody(object)) {
-			return new Response("Precondition Failed", { status: 412 });
+			return new Response('Precondition Failed', { status: 412 });
 		} else {
 			return new Response(object.body, {
 				status: object.range ? 206 : 200,
@@ -160,22 +149,32 @@ async function handle_get(request: Request, bucket: R2Bucket): Promise<Response>
 					'Content-Type': object.httpMetadata?.contentType ?? 'application/octet-stream',
 					// TODO: Content-Length, Content-Range
 
-					...(object.httpMetadata?.contentDisposition ? {
-						'Content-Disposition': object.httpMetadata.contentDisposition,
-					} : {}),
-					...(object.httpMetadata?.contentEncoding ? {
-						'Content-Encoding': object.httpMetadata.contentEncoding,
-					} : {}),
-					...(object.httpMetadata?.contentLanguage ? {
-						'Content-Language': object.httpMetadata.contentLanguage,
-					} : {}),
-					...(object.httpMetadata?.cacheControl ? {
-						'Cache-Control': object.httpMetadata.cacheControl,
-					} : {}),
-					...(object.httpMetadata?.cacheExpiry ? {
-						'Cache-Expiry': object.httpMetadata.cacheExpiry.toISOString(),
-					} : {}),
-				}
+					...(object.httpMetadata?.contentDisposition
+						? {
+								'Content-Disposition': object.httpMetadata.contentDisposition,
+							}
+						: {}),
+					...(object.httpMetadata?.contentEncoding
+						? {
+								'Content-Encoding': object.httpMetadata.contentEncoding,
+							}
+						: {}),
+					...(object.httpMetadata?.contentLanguage
+						? {
+								'Content-Language': object.httpMetadata.contentLanguage,
+							}
+						: {}),
+					...(object.httpMetadata?.cacheControl
+						? {
+								'Cache-Control': object.httpMetadata.cacheControl,
+							}
+						: {}),
+					...(object.httpMetadata?.cacheExpiry
+						? {
+								'Cache-Expiry': object.httpMetadata.cacheExpiry.toISOString(),
+							}
+						: {}),
+				},
 			});
 		}
 	}
@@ -209,10 +208,11 @@ async function handle_delete(request: Request, bucket: R2Bucket): Promise<Respon
 	let resource_path = make_resource_path(request);
 
 	if (resource_path === '') {
-		let r2_objects, cursor: string | undefined = undefined;
+		let r2_objects,
+			cursor: string | undefined = undefined;
 		do {
 			r2_objects = await bucket.list({ cursor: cursor });
-			let keys = r2_objects.objects.map(object => object.key);
+			let keys = r2_objects.objects.map((object) => object.key);
 			if (keys.length > 0) {
 				await bucket.delete(keys);
 			}
@@ -234,13 +234,14 @@ async function handle_delete(request: Request, bucket: R2Bucket): Promise<Respon
 		return new Response(null, { status: 204 });
 	}
 
-	let r2_objects, cursor: string | undefined = undefined;
+	let r2_objects,
+		cursor: string | undefined = undefined;
 	do {
 		r2_objects = await bucket.list({
-			prefix: resource_path + "/",
+			prefix: resource_path + '/',
 			cursor: cursor,
 		});
-		let keys = r2_objects.objects.map(object => object.key);
+		let keys = r2_objects.objects.map((object) => object.key);
 		if (keys.length > 0) {
 			await bucket.delete(keys);
 		}
@@ -267,15 +268,15 @@ async function handle_mkcol(request: Request, bucket: R2Bucket): Promise<Respons
 	}
 
 	// Check if the parent directory exists
-	let parent_dir = resource_path.split('/').slice(0, -1).join("/");
+	let parent_dir = resource_path.split('/').slice(0, -1).join('/');
 
-	if (parent_dir !== '' && !await bucket.head(parent_dir)) {
+	if (parent_dir !== '' && !(await bucket.head(parent_dir))) {
 		return new Response('Conflict', { status: 409 });
 	}
 
 	await bucket.put(resource_path, new Uint8Array(), {
 		httpMetadata: request.headers,
-		customMetadata: { resourcetype: '<collection />' }
+		customMetadata: { resourcetype: '<collection />' },
 	});
 	return new Response('', { status: 201 });
 }
@@ -287,7 +288,7 @@ async function handle_propfind(request: Request, bucket: R2Bucket): Promise<Resp
 	let page = `<?xml version="1.0" encoding="utf-8"?>
 <multistatus xmlns="DAV:">`;
 
-	if (resource_path === "") {
+	if (resource_path === '') {
 		page += `
 	<response>
 		<href>/</href>
@@ -321,53 +322,55 @@ async function handle_propfind(request: Request, bucket: R2Bucket): Promise<Resp
 			</prop>
 			<status>HTTP/1.1 200 OK</status>
 		</propstat>
-	</response>`
-	};
+	</response>`;
+	}
 
 	if (is_collection) {
 		let depth = request.headers.get('Depth') ?? 'infinity';
 		switch (depth) {
-			case '0': break;
-			case '1': {
-				let prefix = resource_path === "" ? resource_path : resource_path + '/';
-				for await (let object of listAll(bucket, prefix)) {
-					let href = `/${object.key + (object.customMetadata?.resourcetype === '<collection />' ? '/' : '')}`;
-					page += `
-	<response>
-		<href>${href}</href>
-		<propstat>
-			<prop>
-				${Object.entries(fromR2Object(object))
-							.filter(([_, value]) => value !== undefined)
-							.map(([key, value]) => `<${key}>${value}</${key}>`)
-							.join('\n				')}
-			</prop>
-			<status>HTTP/1.1 200 OK</status>
-		</propstat>
-	</response>`;
-				}
-			}
+			case '0':
 				break;
-			case 'infinity': {
-				let prefix = resource_path === "" ? resource_path : resource_path + '/';
-				for await (let object of listAll(bucket, prefix, true)) {
-					let href = `/${object.key + (object.customMetadata?.resourcetype === '<collection />' ? '/' : '')}`;
-					page += `
+			case '1':
+				{
+					let prefix = resource_path === '' ? resource_path : resource_path + '/';
+					for await (let object of listAll(bucket, prefix)) {
+						let href = `/${object.key + (object.customMetadata?.resourcetype === '<collection />' ? '/' : '')}`;
+						page += `
 	<response>
 		<href>${href}</href>
 		<propstat>
 			<prop>
 				${Object.entries(fromR2Object(object))
-							.filter(([_, value]) => value !== undefined)
-							.map(([key, value]) => `<${key}>${value}</${key}>`)
-							.join('\n				')
-						}
+					.filter(([_, value]) => value !== undefined)
+					.map(([key, value]) => `<${key}>${value}</${key}>`)
+					.join('\n				')}
 			</prop>
 			<status>HTTP/1.1 200 OK</status>
 		</propstat>
 	</response>`;
+					}
+				}
+				break;
+			case 'infinity':
+				{
+					let prefix = resource_path === '' ? resource_path : resource_path + '/';
+					for await (let object of listAll(bucket, prefix, true)) {
+						let href = `/${object.key + (object.customMetadata?.resourcetype === '<collection />' ? '/' : '')}`;
+						page += `
+	<response>
+		<href>${href}</href>
+		<propstat>
+			<prop>
+				${Object.entries(fromR2Object(object))
+					.filter(([_, value]) => value !== undefined)
+					.map(([key, value]) => `<${key}>${value}</${key}>`)
+					.join('\n				')}
+			</prop>
+			<status>HTTP/1.1 200 OK</status>
+		</propstat>
+	</response>`;
+					}
 				}
-			}
 				break;
 			default: {
 				return new Response('Forbidden', { status: 403 });
@@ -395,8 +398,11 @@ async function handle_copy(request: Request, bucket: R2Bucket): Promise<Response
 	destination = destination.endsWith('/') ? destination.slice(0, -1) : destination;
 
 	// Check if the parent directory exists
-	let destination_parent = destination.split('/').slice(0, destination.endsWith('/') ? -2 : -1).join('/');
-	if (destination_parent !== '' && !await bucket.head(destination_parent)) {
+	let destination_parent = destination
+		.split('/')
+		.slice(0, destination.endsWith('/') ? -2 : -1)
+		.join('/');
+	if (destination_parent !== '' && !(await bucket.head(destination_parent))) {
 		return new Response('Conflict', { status: 409 });
 	}
 
@@ -417,10 +423,10 @@ async function handle_copy(request: Request, bucket: R2Bucket): Promise<Response
 		let depth = request.headers.get('Depth') ?? 'infinity';
 		switch (depth) {
 			case 'infinity': {
-				let prefix = resource_path + "/";
+				let prefix = resource_path + '/';
 				const copy = async (object: R2Object) => {
-					let target = destination + "/" + object.key.slice(prefix.length);
-					target = target.endsWith("/") ? target.slice(0, -1) : target;
+					let target = destination + '/' + object.key.slice(prefix.length);
+					target = target.endsWith('/') ? target.slice(0, -1) : target;
 					let src = await bucket.get(object.key);
 					if (src !== null) {
 						await bucket.put(target, src.body, {
@@ -487,8 +493,11 @@ async function handle_move(request: Request, bucket: R2Bucket): Promise<Response
 	destination = destination.endsWith('/') ? destination.slice(0, -1) : destination;
 
 	// Check if the parent directory exists
-	let destination_parent = destination.split('/').slice(0, destination.endsWith('/') ? -2 : -1).join('/');
-	if (destination_parent !== '' && !await bucket.head(destination_parent)) {
+	let destination_parent = destination
+		.split('/')
+		.slice(0, destination.endsWith('/') ? -2 : -1)
+		.join('/');
+	if (destination_parent !== '' && !(await bucket.head(destination_parent))) {
 		return new Response('Conflict', { status: 409 });
 	}
 
@@ -506,7 +515,8 @@ async function handle_move(request: Request, bucket: R2Bucket): Promise<Response
 		return new Response('Bad Request', { status: 400 });
 	}
 
-	if (destination_exists) { // Delete the destination first
+	if (destination_exists) {
+		// Delete the destination first
 		await handle_delete(new Request(new URL(destination_header), request), bucket);
 	}
 
@@ -516,10 +526,10 @@ async function handle_move(request: Request, bucket: R2Bucket): Promise<Response
 		let depth = request.headers.get('Depth') ?? 'infinity';
 		switch (depth) {
 			case 'infinity': {
-				let prefix = resource_path + "/";
+				let prefix = resource_path + '/';
 				const copy = async (object: R2Object) => {
-					let target = destination + "/" + object.key.slice(prefix.length);
-					target = target.endsWith("/") ? target.slice(0, -1) : target;
+					let target = destination + '/' + object.key.slice(prefix.length);
+					target = target.endsWith('/') ? target.slice(0, -1) : target;
 					let src = await bucket.get(object.key);
 					if (src !== null) {
 						await bucket.put(target, src.body, {
@@ -611,9 +621,9 @@ async function dispatch_handler(request: Request, bucket: R2Bucket): Promise<Res
 			return new Response('Method Not Allowed', {
 				status: 405,
 				headers: {
-					'Allow': SUPPORT_METHODS.join(', '),
-					'DAV': DAV_CLASS,
-				}
+					Allow: SUPPORT_METHODS.join(', '),
+					DAV: DAV_CLASS,
+				},
 			});
 		}
 	}
@@ -625,9 +635,10 @@ export default {
 
 		if (request.headers.get('Authorization') !== `Basic ${btoa(`${env.USERNAME}:${env.PASSWORD}`)}`) {
 			return new Response('Unauthorized', {
-				status: 401, headers: {
+				status: 401,
+				headers: {
 					'WWW-Authenticate': 'Basic realm="webdav"',
-				}
+				},
 			});
 		}
 
@@ -636,15 +647,17 @@ export default {
 		// Set CORS headers
 		response.headers.set('Access-Control-Allow-Origin', request.headers.get('Origin') ?? '*');
 		response.headers.set('Access-Control-Allow-Methods', SUPPORT_METHODS.join(', '));
-		response.headers.set('Access-Control-Allow-Headers',
-			["authorization", "content-type", "depth", "overwrite", "destination", "range"].join(', ')
+		response.headers.set(
+			'Access-Control-Allow-Headers',
+			['authorization', 'content-type', 'depth', 'overwrite', 'destination', 'range'].join(', '),
 		);
-		response.headers.set('Access-Control-Expose-Headers',
-			["content-type", "content-length", "dav", "etag", "last-modified", "location", "date", "content-range"].join(', ')
+		response.headers.set(
+			'Access-Control-Expose-Headers',
+			['content-type', 'content-length', 'dav', 'etag', 'last-modified', 'location', 'date', 'content-range'].join(', '),
 		);
 		response.headers.set('Access-Control-Allow-Credentials', 'false');
 		response.headers.set('Access-Control-Max-Age', '86400');
 
-		return response
+		return response;
 	},
 };