diff --git a/src/api/v3/keyoxide_profile.js b/src/api/v3/keyoxide_profile.js
index ef637a0..3c56e39 100644
--- a/src/api/v3/keyoxide_profile.js
+++ b/src/api/v3/keyoxide_profile.js
@@ -77,9 +77,9 @@ const doVerification = async (profile) => {
   }
   await Promise.all(promises)
 
-  results.forEach(result => {
+  for (const result of results) {
     profile.personas[result[0]].claims[result[1]] = result[2]
-  })
+  }
 
   return profile
 }
diff --git a/src/index.js b/src/index.js
index faf331d..fb0aa89 100644
--- a/src/index.js
+++ b/src/index.js
@@ -30,8 +30,8 @@ more information on this, and how to apply and follow the GNU AGPL, see <https:/
 import express from 'express'
 import * as httpContext from 'express-http-context2'
 import { nanoid } from 'nanoid'
-import { readFileSync } from 'fs'
-import { execSync } from 'child_process'
+import { readFileSync } from 'node:fs'
+import { execSync } from 'node:child_process'
 import { stringReplace } from 'string-replace-middleware'
 import * as pug from 'pug'
 import * as dotenv from 'dotenv'
diff --git a/src/routes/main.js b/src/routes/main.js
index 60266d1..eef1edd 100644
--- a/src/routes/main.js
+++ b/src/routes/main.js
@@ -29,7 +29,7 @@ more information on this, and how to apply and follow the GNU AGPL, see <https:/
 */
 import express from 'express'
 import markdownImport from 'markdown-it'
-import { readFileSync } from 'fs'
+import { readFileSync } from 'node:fs'
 import { getMetaFromReq } from '../server/utils.js'
 
 const router = express.Router()
@@ -74,7 +74,8 @@ router.get('/.well-known/webfinger', (req, res) => {
   if (!req.query.resource) {
     res.status(400).send()
     return
-  } else if (![body.subject, ...body.aliases].includes(req.query.resource)) {
+  }
+  if (![body.subject, ...body.aliases].includes(req.query.resource)) {
     res.status(404).send()
     return
   }
diff --git a/src/routes/util.js b/src/routes/util.js
index 1d42175..d221185 100644
--- a/src/routes/util.js
+++ b/src/routes/util.js
@@ -32,60 +32,60 @@ import { escapedParam, getMetaFromReq } from '../server/utils.js'
 
 const router = express.Router()
 
-router.get('/', function (req, res) {
+router.get('/', (req, res) => {
   res.render('util/index', { meta: getMetaFromReq(req) })
 })
-router.get('/profile-url', function (req, res) {
+router.get('/profile-url', (req, res) => {
   res.render('util/profile-url', { meta: getMetaFromReq(req) })
 })
 router.get('/profile-url/:input',
   escapedParam('input'),
-  function (req, res) {
+  (req, res) => {
     res.render('util/profile-url', { input: req.params.input, meta: getMetaFromReq(req) })
   })
 
-router.get('/qr', function (req, res) {
+router.get('/qr', (req, res) => {
   res.render('util/qr', { meta: getMetaFromReq(req) })
 })
 router.get('/qr/:input',
   escapedParam('input'),
-  function (req, res) {
+  (req, res) => {
     res.render('util/qr', { input: req.params.input, meta: getMetaFromReq(req) })
   })
 
-router.get('/qrfp', function (req, res) {
+router.get('/qrfp', (req, res) => {
   res.render('util/qrfp', { meta: getMetaFromReq(req) })
 })
 router.get('/qrfp/:input',
   escapedParam('input'),
-  function (req, res) {
+  (req, res) => {
     res.render('util/qrfp', { input: req.params.input, meta: getMetaFromReq(req) })
   })
 
-router.get('/wkd', function (req, res) {
+router.get('/wkd', (req, res) => {
   res.render('util/wkd', { meta: getMetaFromReq(req) })
 })
 router.get('/wkd/:input',
   escapedParam('input'),
-  function (req, res) {
+  (req, res) => {
     res.render('util/wkd', { input: req.params.input, meta: getMetaFromReq(req) })
   })
 
-router.get('/argon2', function (req, res) {
+router.get('/argon2', (req, res) => {
   res.render('util/argon2', { meta: getMetaFromReq(req) })
 })
 router.get('/argon2/:input',
   escapedParam('input'),
-  function (req, res) {
+  (req, res) => {
     res.render('util/argon2', { input: req.params.input, meta: getMetaFromReq(req) })
   })
 
-router.get('/bcrypt', function (req, res) {
+router.get('/bcrypt', (req, res) => {
   res.render('util/bcrypt', { meta: getMetaFromReq(req) })
 })
 router.get('/bcrypt/:input',
   escapedParam('input'),
-  function (req, res) {
+  (req, res) => {
     res.render('util/bcrypt', { input: req.params.input, meta: getMetaFromReq(req) })
   })
 
diff --git a/src/server/index.js b/src/server/index.js
index cb453f4..c880b6b 100644
--- a/src/server/index.js
+++ b/src/server/index.js
@@ -205,16 +205,16 @@ const generateKeybaseProfile = async (username, fingerprint) => {
 }
 
 const processAspProfile = async (/** @type {import('doipjs').Profile */ profile) => {
-  profile.personas.forEach(persona => {
+  for (const persona of profile.personas) {
     // Remove faulty claims
     persona.claims = persona.claims.filter(claim => {
       return claim instanceof doipjs.Claim
     })
 
     // Match claims
-    persona.claims.forEach(claim => {
+    for (const claim of persona.claims) {
       claim.match()
-    })
+    }
 
     // Sort claims
     persona.claims.sort((a, b) => {
@@ -229,7 +229,7 @@ const processAspProfile = async (/** @type {import('doipjs').Profile */ profile)
       }
       return 0
     })
-  })
+  }
 
   // Overwrite avatarUrl
   // TODO: don't overwrite avatarUrl once it's fully supported
@@ -240,16 +240,16 @@ const processAspProfile = async (/** @type {import('doipjs').Profile */ profile)
 }
 
 const processOpenPgpProfile = async (/** @type {import('doipjs').Profile */ profile) => {
-  profile.personas.forEach(persona => {
+  for (const persona of profile.personas) {
     // Remove faulty claims
     persona.claims = persona.claims.filter(claim => {
       return claim instanceof doipjs.Claim
     })
 
     // Match claims
-    persona.claims.forEach(claim => {
+    for (const claim of persona.claims) {
       claim.match()
-    })
+    }
 
     // Sort claims
     persona.claims.sort((a, b) => {
@@ -264,7 +264,7 @@ const processOpenPgpProfile = async (/** @type {import('doipjs').Profile */ prof
       }
       return 0
     })
-  })
+  }
 
   // Overwrite avatarUrl
   // TODO: don't overwrite avatarUrl once it's fully supported
diff --git a/src/server/openpgpProfiles.js b/src/server/openpgpProfiles.js
index b6605e7..b5180e2 100644
--- a/src/server/openpgpProfiles.js
+++ b/src/server/openpgpProfiles.js
@@ -32,7 +32,7 @@ import got from 'got'
 import * as doipjs from 'doipjs'
 import { readKey } from 'openpgp'
 import { computeWKDLocalPart } from './utils.js'
-import { createHash } from 'crypto'
+import { createHash } from 'node:crypto'
 import Keyv from 'keyv'
 
 let c = null
@@ -82,9 +82,8 @@ const fetchWKD = (id) => {
             if (response.statusCode === 200) {
               fetchURL = urlAdvanced
               return new Uint8Array(response.rawBody)
-            } else {
-              return null
             }
+            return null
           })
         } catch (errorAdvanced) {
           logger.debug('Failed to fetch an OpenPGP profile via WKD (advanced URL)',
@@ -95,9 +94,8 @@ const fetchWKD = (id) => {
               if (response.statusCode === 200) {
                 fetchURL = urlDirect
                 return new Uint8Array(response.rawBody)
-              } else {
-                return null
               }
+              return null
             })
           } catch (errorDirect) {
             logger.debug('Failed to fetch an OpenPGP profile via WKD (direct URL)',
diff --git a/src/server/utils.js b/src/server/utils.js
index 894fa6d..3699c7b 100644
--- a/src/server/utils.js
+++ b/src/server/utils.js
@@ -27,7 +27,7 @@ You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary. For
 more information on this, and how to apply and follow the GNU AGPL, see <https://www.gnu.org/licenses/>.
 */
-import { webcrypto as crypto } from 'crypto'
+import { webcrypto as crypto } from 'node:crypto'
 import { Profile } from 'doipjs'
 import Color from 'colorjs.io'
 import { param } from 'express-validator'