diff --git a/README.md b/README.md
index 56062da..ddf37f4 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,5 @@
 # Koodiklinikka
+
 ![Travis](https://travis-ci.org/koodiklinikka/koodiklinikka.fi.svg?branch=master)
 
 <img align="right" src="./public/static/images/logo-new-black.svg" alt="Koodiklinikka-logo" max-width="30%">
@@ -13,7 +14,7 @@
 - projektin hallintaan liittyviin asioihin
 - tai koko Koodiklinikkaan yleisesti.
 
------------------------------
+---
 
 ## Projektin asennus
 
@@ -41,7 +42,6 @@ yarn start
 
 Avaa selaimessasi: [`http://localhost:3000`](http://localhost:3000)
 
-
 ## Komennot
 
 ### `yarn`
diff --git a/TODO.md b/TODO.md
index 4fbb7a5..b1c77d2 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,6 +1,6 @@
-* Stripe
-  * Test ID `pk_test_OmNve9H1OuORlmD4rblpjgzh`
-  * Prod ID `pk_live_xrnwdLNXbt20LMxpIDffJnnC`
-* API integration (test backend `https://lit-plateau-4689.herokuapp.com/`)
-* Hero video
-* Deployment
+- Stripe
+  - Test ID `pk_test_OmNve9H1OuORlmD4rblpjgzh`
+  - Prod ID `pk_live_xrnwdLNXbt20LMxpIDffJnnC`
+- API integration (test backend `https://lit-plateau-4689.herokuapp.com/`)
+- Hero video
+- Deployment
diff --git a/components/ChannelReferenceRenderer.tsx b/components/ChannelReferenceRenderer.tsx
index 2226135..adf2127 100644
--- a/components/ChannelReferenceRenderer.tsx
+++ b/components/ChannelReferenceRenderer.tsx
@@ -8,7 +8,10 @@ function renderStringWithChannelRefs(value: string) {
         const matches = str.match(/<#([A-Z0-9]+)\|([A-Za-z0-9]+)>/);
         if (matches) {
           return (
-            <a href={`https://app.slack.com/client/T03BQ3NU9/${matches[1]}`} key={i}>
+            <a
+              href={`https://app.slack.com/client/T03BQ3NU9/${matches[1]}`}
+              key={i}
+            >
               #{matches[2]}
             </a>
           );
@@ -19,8 +22,11 @@ function renderStringWithChannelRefs(value: string) {
   );
 }
 
-export const ChannelReferenceRenderer = ({ children }: React.PropsWithChildren<{}>) => {
+export const ChannelReferenceRenderer = ({
+  children,
+}: React.PropsWithChildren<{}>) => {
   // TODO: this should probably walk the tree
-  if (typeof children[0] === "string") return renderStringWithChannelRefs(children[0]);
+  if (typeof children[0] === "string")
+    return renderStringWithChannelRefs(children[0]);
   return <>{children}</>;
 };
diff --git a/components/membership/MembershipInfoForm.tsx b/components/membership/MembershipInfoForm.tsx
index 5034825..0906209 100644
--- a/components/membership/MembershipInfoForm.tsx
+++ b/components/membership/MembershipInfoForm.tsx
@@ -32,7 +32,8 @@ const fieldNameTranslations = {
   postcode: { fi: "Postinumero" },
 };
 
-const mailValidateRe = /^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
+const mailValidateRe =
+  /^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
 
 function validateEmail(email) {
   return mailValidateRe.test(email);
diff --git a/data/sponsors.ts b/data/sponsors.ts
index 5c5b587..1bb2eab 100644
--- a/data/sponsors.ts
+++ b/data/sponsors.ts
@@ -1,31 +1,31 @@
-const sponsors = [
-  {
-    name: "Futurice",
-    href: "https://futurice.com/",
-  },
-  {
-    name: "Metosin",
-    href: "https://www.metosin.fi/",
-  },
-  {
-    name: "Solita",
-    href: "https://www.solita.fi/",
-  },
-  {
-    name: "Wakeone",
-    href: "https://wakeone.co/",
-  },
-  {
-    name: "Nordea",
-    href: "https://www.nordea.fi/",
-  },
-  {
-    name: "Idean",
-    href: "https://www.idean.com/",
-  },
-  {
-    name: "Rare",
-    href: "https://rare.fi/",
-  },
-];
-export default sponsors;
+const sponsors = [
+  {
+    name: "Futurice",
+    href: "https://futurice.com/",
+  },
+  {
+    name: "Metosin",
+    href: "https://www.metosin.fi/",
+  },
+  {
+    name: "Solita",
+    href: "https://www.solita.fi/",
+  },
+  {
+    name: "Wakeone",
+    href: "https://wakeone.co/",
+  },
+  {
+    name: "Nordea",
+    href: "https://www.nordea.fi/",
+  },
+  {
+    name: "Idean",
+    href: "https://www.idean.com/",
+  },
+  {
+    name: "Rare",
+    href: "https://rare.fi/",
+  },
+];
+export default sponsors;
diff --git a/next.config.js b/next.config.js
index a3bfe23..111564e 100644
--- a/next.config.js
+++ b/next.config.js
@@ -1,4 +1,4 @@
-const withStylus = require('@zeit/next-stylus');
-const withLess = require('@zeit/next-less');
-const withFonts = require('next-fonts');
+const withStylus = require("@zeit/next-stylus");
+const withLess = require("@zeit/next-less");
+const withFonts = require("next-fonts");
 module.exports = withFonts(withLess(withStylus()));
diff --git a/pages/_document.tsx b/pages/_document.tsx
index b08c50a..6775597 100644
--- a/pages/_document.tsx
+++ b/pages/_document.tsx
@@ -11,8 +11,8 @@ class CustomNextHead extends Head {
   // https://github.com/zeit/next-plugins/issues/364
   getCssLinks({ allFiles }) {
     return allFiles
-      .filter(file => file.endsWith(".css"))
-      .map(file => (
+      .filter((file) => file.endsWith(".css"))
+      .map((file) => (
         <style
           key={file}
           nonce={this.props.nonce}
diff --git a/public/static/icons/site.webmanifest b/public/static/icons/site.webmanifest
index 45dc8a2..fa99de7 100755
--- a/public/static/icons/site.webmanifest
+++ b/public/static/icons/site.webmanifest
@@ -1 +1,19 @@
-{"name":"","short_name":"","icons":[{"src":"/android-chrome-192x192.png","sizes":"192x192","type":"image/png"},{"src":"/android-chrome-512x512.png","sizes":"512x512","type":"image/png"}],"theme_color":"#ffffff","background_color":"#ffffff","display":"standalone"}
\ No newline at end of file
+{
+  "name": "",
+  "short_name": "",
+  "icons": [
+    {
+      "src": "/android-chrome-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png"
+    },
+    {
+      "src": "/android-chrome-512x512.png",
+      "sizes": "512x512",
+      "type": "image/png"
+    }
+  ],
+  "theme_color": "#ffffff",
+  "background_color": "#ffffff",
+  "display": "standalone"
+}