diff --git a/package-lock.json b/package-lock.json
index f1662c6..00bbb22 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6342,9 +6342,9 @@
       "dev": true
     },
     "prettier": {
-      "version": "1.19.1",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-1.19.1.tgz",
-      "integrity": "sha512-s7PoyDv/II1ObgQunCbB9PdLmUcBZcnWOcxDh7O0N/UwDEsHyqkW+Qh28jW+mVuCdx7gLB0BotYI1Y6uI9iyew==",
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-2.0.2.tgz",
+      "integrity": "sha512-5xJQIPT8BraI7ZnaDwSbu5zLrB6vvi8hVV58yHQ+QK64qrY40dULy0HSRlQ2/2IdzeBpjhDkqdcFBnFeDEMVdg==",
       "dev": true
     },
     "pretty-format": {
diff --git a/package.json b/package.json
index 0cfd3a7..f0b4181 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "scripts": {
     "start": "concurrently \"tsc --watch\" \"nodemon lib\"",
-    "test": "tsc && jest && prettier --check 'src/**'"
+    "test": "tsc && jest && prettier --check src"
   },
   "dependencies": {
     "caddy-npm": "^2.0.0-beta.20",
@@ -31,7 +31,7 @@
     "jest": "^25.2.4",
     "nodemailer": "^6.4.6",
     "nodemon": "^2.0.2",
-    "prettier": "^1.19.1",
+    "prettier": "^2.0.2",
     "qs": "^6.9.3",
     "typescript": "^3.8.3"
   },
diff --git a/src/check.ts b/src/check.ts
index 16ce00a..b5e12a4 100644
--- a/src/check.ts
+++ b/src/check.ts
@@ -4,7 +4,7 @@ import fs from "fs";
 console.log("STARTED");
 for (const feed of fs
   .readdirSync("static/feeds")
-  .filter(file => !file.startsWith("."))) {
+  .filter((file) => !file.startsWith("."))) {
   try {
     const xml: any = xmlbuilder2.convert(
       fs.readFileSync(`static/feeds/${feed}`, "utf8"),
diff --git a/src/index.tsx b/src/index.tsx
index 794a0d9..bdd4c40 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -38,7 +38,7 @@ export const webServer = express()
           </Layout>
         )
       );
-    })().catch(error => {
+    })().catch((error) => {
       console.error(
         `Error creating feed: ${JSON.stringify({ name, identifier }, null, 2)}`
       );
@@ -83,7 +83,7 @@ export const emailServer = new SMTPServer({
         title: email.subject ?? "",
         author: email.from?.text ?? "",
         content:
-          typeof email.html === "string" ? email.html : email.textAsHtml ?? ""
+          typeof email.html === "string" ? email.html : email.textAsHtml ?? "",
       });
       for (const { address } of session.envelope.rcptTo) {
         const match = address.match(/^(\w+)@kill-the-newsletter.com$/);
@@ -102,7 +102,7 @@ export const emailServer = new SMTPServer({
         await writeFileAtomic(path, renderXML(xml));
       }
       callback();
-    })().catch(error => {
+    })().catch((error) => {
       console.error(
         `Error receiving email: ${JSON.stringify({ session, email }, null, 2)}`
       );
@@ -110,7 +110,7 @@ export const emailServer = new SMTPServer({
       stream.resume();
       callback(new Error("Failed to receive message. Please try again."));
     });
-  }
+  },
 }).listen(process.env.EMAIL_PORT ?? 2525);
 
 function Layout({ children }: { children: React.ReactNode }) {
@@ -226,13 +226,13 @@ function Feed({ name, identifier }: { name: string; identifier: string }) {
         {
           "@rel": "self",
           "@type": "application/atom+xml",
-          "@href": feedURL(identifier)
+          "@href": feedURL(identifier),
         },
         {
           "@rel": "alternate",
           "@type": "text/html",
-          "@href": "https://www.kill-the-newsletter.com/"
-        }
+          "@href": "https://www.kill-the-newsletter.com/",
+        },
       ],
       id: urn(identifier),
       title: name,
@@ -246,16 +246,16 @@ function Feed({ name, identifier }: { name: string; identifier: string }) {
         author: "Kill the Newsletter!",
         content: ReactDOMServer.renderToStaticMarkup(
           <Created identifier={identifier}></Created>
-        )
-      })
-    }
+        ),
+      }),
+    },
   };
 }
 
 function Entry({
   title,
   author,
-  content
+  content,
 }: {
   title: string;
   author: string;
@@ -270,17 +270,17 @@ function Entry({
       link: {
         "@rel": "alternate",
         "@type": "text/html",
-        "@href": "https://www.kill-the-newsletter.com/entry"
+        "@href": "https://www.kill-the-newsletter.com/entry",
       },
-      content: { "@type": "html", "#": content }
-    }
+      content: { "@type": "html", "#": content },
+    },
   };
 }
 
 function createIdentifier(): string {
   return cryptoRandomString({
     length: 20,
-    characters: "1234567890qwertyuiopasdfghjklzxcvbnm"
+    characters: "1234567890qwertyuiopasdfghjklzxcvbnm",
   });
 }
 
@@ -312,13 +312,13 @@ function renderXML(xml: object): string {
   return xmlbuilder2.convert({ invalidCharReplacement: "" }, xml, {
     format: "xml",
     noDoubleEncoding: true,
-    prettyPrint: true
+    prettyPrint: true,
   });
 }
 
 function parseXML(xml: string): any {
   return xmlbuilder2.convert({ invalidCharReplacement: "" }, xml, {
     format: "object",
-    noDoubleEncoding: true
+    noDoubleEncoding: true,
   });
 }
diff --git a/src/test.ts b/src/test.ts
index 5aabb79..ca72d11 100644
--- a/src/test.ts
+++ b/src/test.ts
@@ -18,7 +18,7 @@ describe("receive email", () => {
       from: "publisher@example.com",
       to: `${identifier}@kill-the-newsletter.com`,
       subject: "New Message",
-      html: "<p>HTML content</p>"
+      html: "<p>HTML content</p>",
     });
     const after = await getFeed(identifier);
     expect(after.match(/<updated>(.*)<\/updated>/)![1]).not.toMatch(
@@ -32,7 +32,7 @@ describe("receive email", () => {
       from: "publisher@example.com",
       to: `${identifier}@kill-the-newsletter.com`,
       subject: "New Message",
-      html: "<p>HTML content</p>"
+      html: "<p>HTML content</p>",
     });
     const feed = await getFeed(identifier);
     expect(feed).toMatch("publisher@example.com");
@@ -46,7 +46,7 @@ describe("receive email", () => {
       from: "publisher@example.com",
       to: `${identifier}@kill-the-newsletter.com`,
       subject: "New Message",
-      text: "TEXT content"
+      text: "TEXT content",
     });
     const feed = await getFeed(identifier);
     expect(feed).toMatch("TEXT content");
@@ -58,7 +58,7 @@ describe("receive email", () => {
       from: "publisher@example.com",
       to: `${identifier}@kill-the-newsletter.com`,
       subject: "New Message",
-      text: "TEXT content\n\nhttps://www.kill-the-newsletter.com\n\nMore text"
+      text: "TEXT content\n\nhttps://www.kill-the-newsletter.com\n\nMore text",
     });
     const feed = await getFeed(identifier);
     expect(feed).toMatch("TEXT content");
@@ -71,7 +71,7 @@ describe("receive email", () => {
       from: "publisher@example.com",
       to: `${identifier}@kill-the-newsletter.com`,
       subject: "New Message",
-      html: "<p>Invalid XML character (backspace): ‘\b’</p>"
+      html: "<p>Invalid XML character (backspace): ‘\b’</p>",
     });
     const feed = await getFeed(identifier);
     expect(feed).toMatch("Invalid XML character (backspace): ‘’");
@@ -83,7 +83,7 @@ describe("receive email", () => {
       from: "publisher@example.com",
       to: `${identifier}@kill-the-newsletter.com`,
       subject: "New Message",
-      text: "Invalid XML character (backspace): ‘\b’"
+      text: "Invalid XML character (backspace): ‘\b’",
     });
     const feed = await getFeed(identifier);
     expect(feed).toMatch(
@@ -96,7 +96,7 @@ describe("receive email", () => {
     await emailClient.sendMail({
       from: "publisher@example.com",
       to: `${identifier}@kill-the-newsletter.com`,
-      subject: "New Message"
+      subject: "New Message",
     });
     const feed = await getFeed(identifier);
     expect(feed).toMatch("New Message");
@@ -107,7 +107,7 @@ describe("receive email", () => {
     await emailClient.sendMail({
       from: "publisher@example.com",
       to: `${identifier}@kill-the-newsletter.com`,
-      html: "<p>HTML content</p>"
+      html: "<p>HTML content</p>",
     });
     const feed = await getFeed(identifier);
     expect(feed).toMatch("HTML content");
@@ -120,7 +120,7 @@ describe("receive email", () => {
         from: "publisher@example.com",
         to: `${identifier}@kill-the-newsletter.com`,
         subject: "New Message",
-        text: `REPETITION ${repetition} `.repeat(10_000)
+        text: `REPETITION ${repetition} `.repeat(10_000),
       });
     const feed = await getFeed(identifier);
     expect(feed).toMatch("REPETITION 3");
@@ -132,7 +132,7 @@ describe("receive email", () => {
       from: "publisher@example.com",
       to: "nonexistent@kill-the-newsletter.com",
       subject: "New Message",
-      html: "<p>HTML content</p>"
+      html: "<p>HTML content</p>",
     });
   });
 
@@ -141,7 +141,7 @@ describe("receive email", () => {
     await emailClient.sendMail({
       to: `${identifier}@kill-the-newsletter.com`,
       subject: "New Message",
-      html: "<p>HTML content</p>"
+      html: "<p>HTML content</p>",
     });
     const feed = await getFeed(identifier);
     expect(feed).toMatch("HTML content");
@@ -154,7 +154,7 @@ afterAll(() => {
 });
 
 const webClient = axios.create({
-  baseURL: `http://localhost:${(webServer.address() as AddressInfo).port}`
+  baseURL: `http://localhost:${(webServer.address() as AddressInfo).port}`,
 });
 const emailClient = nodemailer.createTransport(
   `smtp://localhost:${(emailServer.address() as AddressInfo).port}`
@@ -165,7 +165,7 @@ async function createFeed(): Promise<string> {
     await webClient.post(
       "/",
       qs.stringify({
-        name: "My Feed"
+        name: "My Feed",
       })
     )
   ).data.match(/(\w{20}).xml/)![1];