diff --git a/config.js.template b/config.js.template
index db6c801..c966e3a 100644
--- a/config.js.template
+++ b/config.js.template
@@ -7,7 +7,7 @@ const config = {
   theme: process.env.THEME || '', // '' or 'dark'
   http_addr: process.env.HTTP_ADDR || '127.0.0.1', // Bind Wikiless to a specific IP address.
   nonssl_port: process.env.NONSSL_PORT || 8080,
-  
+
   /**
   * If your environment is using HTTPS, set these configs below.
   */
@@ -15,22 +15,21 @@ const config = {
   ssl_port: process.env.SSL_PORT || 8088,
   cert_dir: process.env.CERT_DIR || ``, // For example '/home/wikiless/letsencrypt/live/wikiless.org'. No trailing slash.
   redirect_http_to_https: process.env.REDIRECT_HTTP_TO_HTTPS === 'true' || false, // If true, HTTP requests will be redirected to HTTPS.
-  
+
   /**
   * You can configure redis below if needed.
   */
-  redis_db: process.env.REDIS_DB,
   redis_host: process.env.REDIS_HOST || '127.0.0.1',
   redis_password: process.env.REDIS_PASSWORD,
   redis_port: process.env.REDIS_PORT || 6379,
-  
+
   /**
   * You might need to change these configs below if you host through a reverse
   * proxy like nginx.
   */
   trust_proxy: process.env.TRUST_PROXY === 'true' || false,
   trust_proxy_address: process.env.TRUST_PROXY_ADDRESS || '127.0.0.1',
-  
+
   /**
   * Redis cache expiration values (in seconds).
   * When the cache expires, new content is fetched from Wikipedia (when the
@@ -39,14 +38,14 @@ const config = {
   setexs: {
     wikipage: process.env.WIKIPAGE_CACHE_EXPIRATION || (60 * 60 * 1), // 1 hour
   },
-  
+
   /**
   * Wikimedia requires a HTTP User-agent header for all Wikimedia related
   * requests. It's a good idea to change this to something unique.
   * Read more: https://meta.wikimedia.org/wiki/User-Agent_policy
   */
   wikimedia_useragent: process.env.wikimedia_useragent || 'Wikiless media proxy bot (https://codeberg.org/orenom/Wikiless)',
-  
+
   /**
   * Cache control. Wikiless can automatically remove the cached media files from
   * the server. Cache control is on by default.
diff --git a/package-lock.json b/package-lock.json
index 5af2799..69239ca 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,724 +1,85 @@
 {
   "name": "Wikiless",
   "version": "0.0.5",
-  "lockfileVersion": 2,
+  "lockfileVersion": 1,
   "requires": true,
-  "packages": {
-    "": {
-      "name": "Wikiless",
-      "version": "0.0.4",
-      "license": "APGL-3.0",
-      "dependencies": {
-        "body-parser": "^1.19.0",
-        "compression": "^1.7.4",
-        "cookie-parser": "^1.4.5",
-        "express": "^4.17.1",
-        "node-html-parser": "^3.1.5",
-        "redis": "^3.1.1"
-      },
-      "devDependencies": {}
-    },
-    "node_modules/accepts": {
-      "version": "1.3.7",
-      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
-      "integrity": "sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==",
-      "dependencies": {
-        "mime-types": "~2.1.24",
-        "negotiator": "0.6.2"
-      },
-      "engines": {
-        "node": ">= 0.6"
-      }
-    },
-    "node_modules/array-flatten": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
-      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
-    },
-    "node_modules/body-parser": {
-      "version": "1.19.0",
-      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.0.tgz",
-      "integrity": "sha512-dhEPs72UPbDnAQJ9ZKMNTP6ptJaionhP5cBb541nXPlW60Jepo9RV/a4fX4XWW9CuFNK22krhrj1+rgzifNCsw==",
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-        "bytes": "3.1.0",
-        "content-type": "~1.0.4",
-        "debug": "2.6.9",
-        "depd": "~1.1.2",
-        "http-errors": "1.7.2",
-        "iconv-lite": "0.4.24",
-        "on-finished": "~2.3.0",
-        "qs": "6.7.0",
-        "raw-body": "2.4.0",
-        "type-is": "~1.6.17"
-      },
-      "engines": {
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-      }
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-    "node_modules/boolbase": {
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-      },
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-    },
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+    "mimic-response": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/mimic-response/-/mimic-response-1.0.1.tgz",
+      "integrity": "sha512-j5EctnkH7amfV/q5Hgmoal1g2QHFJRraOtmx0JpIqkxhBhI/lJSl1nMpQ45hVarwNETOoWEimndZ4QK0RHxuxQ=="
+    },
     "ms": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
@@ -1067,6 +565,11 @@
         "he": "1.2.0"
       }
     },
+    "normalize-url": {
+      "version": "6.1.0",
+      "resolved": "https://registry.npmjs.org/normalize-url/-/normalize-url-6.1.0.tgz",
+      "integrity": "sha512-DlL+XwOy3NxAQ8xuC0okPgK46iuVNAK01YN7RueYBqqFeGsBjV9XmCAzAdgt+667bCl5kPh9EqKKDwnaPG1I7A=="
+    },
     "nth-check": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/nth-check/-/nth-check-2.0.1.tgz",
@@ -1088,6 +591,19 @@
       "resolved": "https://registry.npmjs.org/on-headers/-/on-headers-1.0.2.tgz",
       "integrity": "sha512-pZAE+FJLoyITytdqK0U5s+FIpjN0JP3OzFi/u8Rx+EV5/W+JTWGXG8xFzevE7AjBfDqHv/8vL8qQsIhHnqRkrA=="
     },
+    "once": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
+      "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
+      "requires": {
+        "wrappy": "1"
+      }
+    },
+    "p-cancelable": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/p-cancelable/-/p-cancelable-2.1.1.tgz",
+      "integrity": "sha512-BZOr3nRQHOntUjTrH8+Lh54smKHoHyur8We1V8DSMVrl5A2malOOwuJRnKRDjSnkoeBh4at6BwEnb5I7Jl31wg=="
+    },
     "parseurl": {
       "version": "1.3.3",
       "resolved": "https://registry.npmjs.org/parseurl/-/parseurl-1.3.3.tgz",
@@ -1107,10 +623,24 @@
         "ipaddr.js": "1.9.1"
       }
     },
+    "pump": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/pump/-/pump-3.0.0.tgz",
+      "integrity": "sha512-LwZy+p3SFs1Pytd/jYct4wpv49HiYCqd9Rlc5ZVdk0V+8Yzv6jR5Blk3TRmPL1ft69TxP0IMZGJ+WPFU2BFhww==",
+      "requires": {
+        "end-of-stream": "^1.1.0",
+        "once": "^1.3.1"
+      }
+    },
     "qs": {
-      "version": "6.7.0",
-      "resolved": "https://registry.npmjs.org/qs/-/qs-6.7.0.tgz",
-      "integrity": "sha512-VCdBRNFTX1fyE7Nb6FYoURo/SPe62QCaAyzJvUjwRaIsc+NePBEniHlvxFmmX56+HZphIGtV0XeCirBtpDrTyQ=="
+      "version": "6.9.6",
+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.9.6.tgz",
+      "integrity": "sha512-TIRk4aqYLNoJUbd+g2lEdz5kLWIuTMRagAXxl78Q0RiVjAOugHmeKNGdd3cwo/ktpf9aL9epCfFqWDEKysUlLQ=="
+    },
+    "quick-lru": {
+      "version": "5.1.1",
+      "resolved": "https://registry.npmjs.org/quick-lru/-/quick-lru-5.1.1.tgz",
+      "integrity": "sha512-WuyALRjWPDGtt/wzJiadO5AXY+8hZ80hVpe6MyivgraREW751X3SbhRvG3eLKOYN+8VEvqLcf3wdnt44Z4S4SA=="
     },
     "range-parser": {
       "version": "1.2.1",
@@ -1118,32 +648,27 @@
       "integrity": "sha512-Hrgsx+orqoygnmhFbKaHE6c296J+HTAQXoxEF6gNupROmmGJRoyzfG3ccAveqCBrwr/2yxQ5BVd/GTl5agOwSg=="
     },
     "raw-body": {
-      "version": "2.4.0",
-      "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-2.4.0.tgz",
-      "integrity": "sha512-4Oz8DUIwdvoa5qMJelxipzi/iJIi40O5cGV1wNYp5hvZP8ZN0T+jiNkL0QepXs+EsQ9XJ8ipEDoiH70ySUJP3Q==",
+      "version": "2.4.2",
+      "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-2.4.2.tgz",
+      "integrity": "sha512-RPMAFUJP19WIet/99ngh6Iv8fzAbqum4Li7AD6DtGaW2RpMB/11xDoalPiJMTbu6I3hkbMVkATvZrqb9EEqeeQ==",
       "requires": {
-        "bytes": "3.1.0",
-        "http-errors": "1.7.2",
+        "bytes": "3.1.1",
+        "http-errors": "1.8.1",
         "iconv-lite": "0.4.24",
         "unpipe": "1.0.0"
       }
     },
     "redis": {
-      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/redis/-/redis-3.1.2.tgz",
-      "integrity": "sha512-grn5KoZLr/qrRQVwoSkmzdbw6pwF+/rwODtrOr6vuBRiR/f3rjSTGupbF90Zpqm2oenix8Do6RV7pYEkGwlKkw==",
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/redis/-/redis-4.0.1.tgz",
+      "integrity": "sha512-qfcq1oz2ci7pNdCfTLLEuKhS8jZ17dFiT1exogOr+jd3EVP/h9qpy7K+VajB4BXA0k8q68KFqR6HrliKV6jt1Q==",
       "requires": {
-        "denque": "^1.5.0",
-        "redis-commands": "^1.7.0",
-        "redis-errors": "^1.2.0",
-        "redis-parser": "^3.0.0"
+        "@node-redis/client": "^1.0.1",
+        "@node-redis/json": "^1.0.1",
+        "@node-redis/search": "^1.0.1",
+        "@node-redis/time-series": "^1.0.0"
       }
     },
-    "redis-commands": {
-      "version": "1.7.0",
-      "resolved": "https://registry.npmjs.org/redis-commands/-/redis-commands-1.7.0.tgz",
-      "integrity": "sha512-nJWqw3bTFy21hX/CPKHth6sfhZbdiHP6bTawSgQBlKOVRG7EZkfHbbHwQJnrE4vsQf0CMNE+3gJ4Fmm16vdVlQ=="
-    },
     "redis-errors": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/redis-errors/-/redis-errors-1.2.0.tgz",
@@ -1157,6 +682,19 @@
         "redis-errors": "^1.0.0"
       }
     },
+    "resolve-alpn": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/resolve-alpn/-/resolve-alpn-1.2.1.tgz",
+      "integrity": "sha512-0a1F4l73/ZFZOakJnQ3FvkJ2+gSTQWz/r2KE5OdDY0TxPm5h4GkqkWWfM47T7HsbnOtcJVEF4epCVy6u7Q3K+g=="
+    },
+    "responselike": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/responselike/-/responselike-2.0.0.tgz",
+      "integrity": "sha512-xH48u3FTB9VsZw7R+vvgaKeLKzT6jOogbQhEe/jewwnZgzPcnyWui2Av6JpoYZF/91uueC+lqhWqeURw5/qhCw==",
+      "requires": {
+        "lowercase-keys": "^2.0.0"
+      }
+    },
     "safe-buffer": {
       "version": "5.1.2",
       "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
@@ -1168,9 +706,9 @@
       "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
     },
     "send": {
-      "version": "0.17.1",
-      "resolved": "https://registry.npmjs.org/send/-/send-0.17.1.tgz",
-      "integrity": "sha512-BsVKsiGcQMFwT8UxypobUKyv7irCNRHk1T0G680vk88yf6LBByGcZJOTJCrTP2xVN6yI+XjPJcNuE3V4fT9sAg==",
+      "version": "0.17.2",
+      "resolved": "https://registry.npmjs.org/send/-/send-0.17.2.tgz",
+      "integrity": "sha512-UJYB6wFSJE3G00nEivR5rgWp8c2xXvJ3OPWPhmuteU0IKj8nKbG3DrjiOmLwpnHGYWAVwA69zmTm++YG0Hmwww==",
       "requires": {
         "debug": "2.6.9",
         "depd": "~1.1.2",
@@ -1179,36 +717,36 @@
         "escape-html": "~1.0.3",
         "etag": "~1.8.1",
         "fresh": "0.5.2",
-        "http-errors": "~1.7.2",
+        "http-errors": "1.8.1",
         "mime": "1.6.0",
-        "ms": "2.1.1",
+        "ms": "2.1.3",
         "on-finished": "~2.3.0",
         "range-parser": "~1.2.1",
         "statuses": "~1.5.0"
       },
       "dependencies": {
         "ms": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.1.tgz",
-          "integrity": "sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg=="
+          "version": "2.1.3",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
+          "integrity": "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA=="
         }
       }
     },
     "serve-static": {
-      "version": "1.14.1",
-      "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-1.14.1.tgz",
-      "integrity": "sha512-JMrvUwE54emCYWlTI+hGrGv5I8dEwmco/00EvkzIIsR7MqrHonbD9pO2MOfFnpFntl7ecpZs+3mW+XbQZu9QCg==",
+      "version": "1.14.2",
+      "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-1.14.2.tgz",
+      "integrity": "sha512-+TMNA9AFxUEGuC0z2mevogSnn9MXKb4fa7ngeRMJaaGv8vTwnIEkKi+QGvPt33HSnf8pRS+WGM0EbMtCJLKMBQ==",
       "requires": {
         "encodeurl": "~1.0.2",
         "escape-html": "~1.0.3",
         "parseurl": "~1.3.3",
-        "send": "0.17.1"
+        "send": "0.17.2"
       }
     },
     "setprototypeof": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.1.1.tgz",
-      "integrity": "sha512-JvdAWfbXeIGaZ9cILp38HntZSFSo3mWg6xGcJJsd+d4aRMOqauag1C63dJfDw7OaMYwEbHMOxEZ1lqVRYP2OAw=="
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.2.0.tgz",
+      "integrity": "sha512-E5LDX7Wrp85Kil5bhZv46j8jOeboKq5JMmYM3gVGdGH8xFpPWXUMsNrlODCrkoxMEeNi/XZIwuRvY4XNwYMJpw=="
     },
     "statuses": {
       "version": "1.5.0",
@@ -1216,9 +754,9 @@
       "integrity": "sha1-Fhx9rBd2Wf2YEfQ3cfqZOBR4Yow="
     },
     "toidentifier": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.0.tgz",
-      "integrity": "sha512-yaOH/Pk/VEhBWWTlhI+qXxDFXlejDGcQipMlyxda9nthulaxLZUNcUqFxokp0vcYnvteJln5FNQDRrxj3YcbVw=="
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
+      "integrity": "sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA=="
     },
     "type-is": {
       "version": "1.6.18",
@@ -1243,6 +781,16 @@
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
       "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
+    },
+    "wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
+    },
+    "yallist": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
     }
   }
 }
diff --git a/package.json b/package.json
index 800cbce..023a6c5 100644
--- a/package.json
+++ b/package.json
@@ -8,8 +8,9 @@
     "compression": "^1.7.4",
     "cookie-parser": "^1.4.5",
     "express": "^4.17.1",
+    "got": "^11.8.3",
     "node-html-parser": "^3.1.5",
-    "redis": "^3.1.1"
+    "redis": "^4.0.1"
   },
   "devDependencies": {},
   "scripts": {
diff --git a/src/utils.js b/src/utils.js
index 5fca42e..e611fa7 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -1,69 +1,63 @@
 module.exports = function(redis) {
   const config = require('../config')
-  const https = require('https')
   const parser = require('node-html-parser')
-  const fs = require('fs')
+  const fs = require('fs').promises
+  const { existsSync } = require('fs')
   const path = require('path')
+  const got = require('got')
 
   this.download = async (url, params = '') => {
-    return new Promise(resolve => {
-      if(!url) {
-        resolve({ success: false, reason: 'MISSING_URL' })
+    if(!url) {
+      return { success: false, reason: 'MISSING_URL' }
+    }
+
+    if(url.includes('?')) {
+      let wikipage = url.split('wikipedia.org/wiki/')[1]
+      let uriencoded_wikipage = ''
+
+      if(wikipage) {
+        uriencoded_wikipage = encodeURIComponent(wikipage)
       }
+      url = url.replace(wikipage, uriencoded_wikipage)
+    }
 
-      if(url.includes('?')) {
-        let wikipage = url.split('wikipedia.org/wiki/')[1]
-        let uriencoded_wikipage = ''
+    if(params) {
+      url = `${url}?${params}`
+    }
 
-        if(wikipage) {
-          uriencoded_wikipage = encodeURIComponent(wikipage)
+    let data = ''
+    try {
+      if(redis.isOpen === false) {
+        await redis.connect()
+      }
+      data = await redis.get(url)
+    } catch(err) {
+      console.log(`Error while fetching key ${url} from cache. Error: ${err}`)
+    }
+
+    if(data) {
+      console.log(`Got key ${url} from cache.`)
+      return { success: true, html: data, processed: true }
+    }
+    try {
+      const gotUrl = new URL(url)
+      const { body } = await got(gotUrl)
+
+      console.log(`Fetched url ${url} from Wikipedia.`)
+      return { success: true, html: body, processed: false }
+    } catch(err) {
+      const { statusCode } = err.response
+      if(statusCode !== 200) {
+        if(statusCode === 404) {
+          // let's redirect 404s to homepage
+          console.log(`Didn't find ${url} HTTP status code: ${statusCode}`)
+          return { success: false, reason: 'REDIRECT', url: 'https://wikipedia.org/' }
         }
-        url = url.replace(wikipage, uriencoded_wikipage)
+
+        console.log(`Error while fetching data from ${url}. HTTP status code: ${statusCode}`)
+        return { success: false, reason: `INVALID_HTTP_RESPONSE: ${statusCode}` }
       }
-
-      if(params) {
-        url = `${url}?${params}`
-      }
-
-      redis.get(url, (error, data) => {
-        if(data) {
-          console.log(`Got key ${url} from cache.`)
-          resolve({ success: true, html: data, processed: true })
-        } else {
-          https.get(url, (res) => {
-            if(res.statusCode !== 200) {
-              if(res.statusCode === 301 || res.statusCode === 302) {
-                resolve({ success: false, reason: 'REDIRECT', url: res.headers.location })
-                res.resume()
-              } else if(res.statusCode === 404) {
-                // let's redirect 404s to homepage
-                console.log(`Didn't find ${url} HTTP status code: ${res.statusCode}`)
-                res.resume()
-                return resolve({ success: false, reason: 'REDIRECT', url: 'https://wikipedia.org/' })
-              } else {
-                console.log(`Error while fetching data from ${url}. HTTP status code: ${res.statusCode}`)
-                res.resume()
-                return resolve({ success: false, reason: `INVALID_HTTP_RESPONSE: ${res.statusCode}` })
-              }
-            }
-
-            let data = ''
-
-            res.on('data', (chunk) => {
-              data += chunk
-            })
-
-            res.on('end', () => {
-              console.log(`Fetched url ${url} from Wikipedia.`)
-              resolve({ success: true, html: data, processed: false })
-            })
-          }).on('error', (err) => {
-            console.log(`Error while fetching data from ${url}. Error: ${err}`)
-            resolve({ success: false, reason: 'SERVER_ERROR' })
-          })
-        }
-      })
-    })
+    }
   }
 
   this.applyUserMods = (data, theme, lang) => {
@@ -90,233 +84,215 @@ module.exports = function(redis) {
     return data
   }
 
-  this.processHtml = (data, url, params, lang, user_preferences, process_user_prefs) => {
-    return new Promise(resolve => {
-      if(validHtml(data.html)) {
-        url = encodeURI(url)
-        if(params) {
-          url = `${url}?${params}`
-        }
-
-        data.html = parser.parse(data.html)
-
-        // replace default wikipedia top right nav bar links
-        let nav = data.html.querySelector('nav#p-personal .vector-menu-content-list')
-        if(nav) {
-          nav.innerHTML = `
-            <li>
-              <a href="/about">[ about ]</a>
-            </li>
-            <li>
-              <a href="/preferences?back=${url.split('wikipedia.org')[1]}">[ preferences ]</a>
-            </li>
-
-          `
-        }
-
-        // append the lang query param to the URLs starting with /wiki/ or /w/
-        let links = data.html.querySelectorAll('a')
-        for(let i = 0; i < links.length; i++) {
-          let href = links[i].getAttribute('href')
-          if(href && (href.startsWith('/wiki/') || href.startsWith('/w/'))) {
-            href = `${protocol}${config.domain}${href}`
-            let u = new URL(href)
-            u.searchParams.append('lang', lang)
-            href = `${u.pathname}${u.search}`
-            links[i].setAttribute('href', href)
-          }
-        }
-
-        // remove #p-wikibase-otherprojects
-        let wikibase_links = data.html.querySelector('#p-wikibase-otherprojects')
-        if(wikibase_links) {
-          wikibase_links.remove()
-        }
-
-        // remove all <script> elements
-        let script_elements = data.html.querySelectorAll('script')
-        for(let i = 0; i < script_elements.length; i++) {
-          script_elements[i].remove()
-        }
-
-        // remove all <iframe> elements
-        let iframe_elements = data.html.querySelectorAll('iframe')
-        for(let i = 0; i < iframe_elements.length; i++) {
-          iframe_elements[i].remove()
-        }
-
-        // remove all JavaScript event attributes
-        let event_attributes = ['[onAbort]', '[onBlur]', '[onChange]', '[onClick]', '[onDblClick]', '[onError]', '[onFocus]', '[onKeydown]', '[onKeypress]', '[onKeyup]', '[onLoad]'
-, '[onMousedown]', '[onMousemove]', '[onMouseout]', '[onMouseover]', '[onMouseUp]', '[onReset]', '[onSelect]', '[onSubmit]', '[onUnload]']
-        let elements_with_event_attr = data.html.querySelectorAll(event_attributes.join(','))
-        for(let i = 0; i < elements_with_event_attr.length; i++) {
-          for(let j = 0; j < event_attributes.length; j++) {
-            if(typeof(elements_with_event_attr.removeAttribute) === 'function') {
-              elements_with_event_attr.removeAttribute(event_attributes[j])
-            }
-          }
-        }
-
-        /**
-        * Remove the language subdomain from the sidebar language switchers.
-        * Then append the language as a URL query param.
-        */
-        let lang_links = data.html.querySelectorAll('#p-lang .interlanguage-link a')
-        for(let i = 0; i < lang_links.length; i++) {
-          let href = lang_links[i].getAttribute('href')
-          let lang_code = href.split('wikipedia.org')[0].split('//')[1]
-          href = href.replace(lang_code, '')
-          href = `${href}?lang=${lang_code.slice(0, -1)}`
-          lang_links[i].setAttribute('href', href)
-        }
-
-        data.html = data.html.toString()
-
-        // replace upload.wikimedia.org with /media
-        const upload_wikimedia_regx = /((https:|http:|)\/\/?upload.wikimedia.org)/gm
-        data.html = data.html.replace(upload_wikimedia_regx, '/media')
-
-        // replace maps.wikimedia.org with /media/maps_wikimedia_org
-        const maps_wikimedia_regx = /((https:|http:|)\/\/?maps.wikimedia.org)/gm
-        data.html = data.html.replace(maps_wikimedia_regx, '/media/maps_wikimedia_org')
-
-        // replace wikimedia.org with /media
-        const wikimedia_regex = /((https:|http:|)\/\/?wikimedia.org)/gm
-        data.html = data.html.replace(wikimedia_regex, '/media')
-
-        // replace wiki links
-        const wiki_href_regx = /(href=\"(https:|http:|)\/\/([A-z.-]+\.)?(wikipedia.org|wikimedia.org|wikidata.org|mediawiki.org))/gm
-        data.html = data.html.replace(wiki_href_regx, 'href="')
-
-        /**
-        * If we are on DownloadAsPdf page, we have to inject a input which
-        * holds the language value. Without this input, we can't access the
-        * language (not avail from the POST data).
-        * See more on https://codeberg.org/orenom/Wikiless/issues/9
-        */
-        if(url.includes('%3ADownloadAsPdf')) {
-          let lang_input = `<input type='hidden' name='lang' value='${lang}'>`
-          let replace_str = `<input type='hidden' name='page'`
-          data.html = data.html.replace(replace_str, `${lang_input}${replace_str}`)
-        }
-
-        redis.setex(url, config.setexs.wikipage, data.html, (error) => {
-          if(error) {
-            console.log(`Error setting the ${url} key to Redis. Error: ${error}`)
-            resolve({ success: false, reason: 'SERVER_ERROR_REDIS_SET' })
-          } else {
-            resolve({ success: true, html: data.html })
-          }
-        })
-      } else {
-        console.log('Invalid wiki_html.')
-        resolve({ success: false, reason: 'INVALID_HTML' })
-      }
-    })
-  }
-
-  this.proxyMedia = (req, wiki_domain='') => {
-    return new Promise(async resolve => {
-      let params = new URLSearchParams(req.query).toString() || ''
-
+  this.processHtml = async (data, url, params, lang) => {
+    if(validHtml(data.html)) {
+      url = encodeURI(url)
       if(params) {
-        params = '?' + params
+        url = `${url}?${params}`
       }
 
-      let path = ''
-      let domain = 'upload.wikimedia.org'
-      let wikimedia_path = ''
+      data.html = parser.parse(data.html)
 
-      switch (wiki_domain) {
-        case 'maps.wikimedia.org':
-          path = req.url.split('/media/maps_wikimedia_org')[1]
-          domain = 'maps.wikimedia.org'
-          wikimedia_path = path
-          break;
-        case '/api/rest_v1/page/pdf':
-          const lang = req.query.lang || req.cookies.default_lang || config.default_lang
-          domain = `${lang}.wikipedia.org`
-          wikimedia_path = `/api/rest_v1/page/pdf/${req.params.page}`
-          path = `/api/${lang}${wiki_domain}/${req.params.page}`
-          break;
-        case 'wikimedia.org/api/rest_v1/media':
-          domain = 'wikimedia.org'
-          wikimedia_path = req.url.replace('/media/api/rest_v1', '/api/rest_v1')
-          path = req.url.split('/media/api')[1]
-          break;
-        default:
-          path = req.url.split('/media')[1]
-          wikimedia_path = path + params
+      // replace default wikipedia top right nav bar links
+      let nav = data.html.querySelector('nav#p-personal .vector-menu-content-list')
+      if(nav) {
+        nav.innerHTML = `
+          <li>
+            <a href="/about">[ about ]</a>
+          </li>
+          <li>
+            <a href="/preferences?back=${url.split('wikipedia.org')[1]}">[ preferences ]</a>
+          </li>
+
+        `
       }
 
-      url = new URL(`https://${domain}${wikimedia_path}`)
-      const file = await saveFile(url, path)
-
-      if(file.success === true) {
-        resolve({ success: true, path: file.path })
-      } else {
-        resolve({ success: false, reason: file.reason })
-      }
-    })
-  }
-
-  this.saveFile = (url, file_path) => {
-    return new Promise(async resolve => {
-      let media_path = ''
-      if(url.href.startsWith('https://maps.wikimedia.org/')) {
-        media_path = path.join(__dirname, '../media/maps_wikimedia_org')
-      } else if(url.href.startsWith('https://wikimedia.org/media/api/')) {
-        media_path = path.join(__dirname, '../media/api')
-      } else {
-        media_path = path.join(__dirname, '../media')
-      }
-
-      const path_with_filename = decodeURI(`${media_path}${file_path}`)
-      let path_without_filename = path_with_filename.split('/')
-          path_without_filename.pop()
-          path_without_filename = path_without_filename.join('/')
-
-      if(!fs.existsSync(path_with_filename)) {
-        fs.mkdir(path_without_filename, { recursive: true }, (err) => {
-          if(err) {
-            resolve({ success: false, reason: 'MKDIR_FAILED' })
-          } else {
-            let file = fs.createWriteStream(path_with_filename)
-            const options = {
-              headers: { 'User-Agent': config.wikimedia_useragent }
-            }
-
-            https.get(url.href, options, (res) => {
-              res.pipe(file)
-              file.on('finish', () => {
-                file.close()
-                res.resume()
-                resolve({ success: true, path: path_with_filename })
-              })
-            }).on('error', (err) => {
-              console.log('Error while fetching data. Details:', err)
-              resolve({ success: false, reason: 'SERVER_ERROR' })
-            })
-          }
-        })
-      } else {
-        resolve({ success: true, path: path_with_filename })
-      }
-    })
-  }
-
-  this.writeToDisk = (data, file) => {
-    return new Promise(resolve => {
-      fs.writeFile(file, data, 'binary', (error, result) => {
-        if(!error) {
-          resolve({ success: true })
-        } else {
-          resolve({ success: false, reason: error })
+      // append the lang query param to the URLs starting with /wiki/ or /w/
+      let links = data.html.querySelectorAll('a')
+      for(let i = 0; i < links.length; i++) {
+        let href = links[i].getAttribute('href')
+        if(href && (href.startsWith('/wiki/') || href.startsWith('/w/'))) {
+          href = `${protocol}${config.domain}${href}`
+          let u = new URL(href)
+          u.searchParams.append('lang', lang)
+          href = `${u.pathname}${u.search}`
+          links[i].setAttribute('href', href)
         }
-      })
-    }).catch((err) => {
-      console.log('Writing media file to disk failed for unknown reason. Details:', err)
-    })
+      }
+
+      // remove #p-wikibase-otherprojects
+      let wikibase_links = data.html.querySelector('#p-wikibase-otherprojects')
+      if(wikibase_links) {
+        wikibase_links.remove()
+      }
+
+      // remove all <script> elements
+      let script_elements = data.html.querySelectorAll('script')
+      for(let i = 0; i < script_elements.length; i++) {
+        script_elements[i].remove()
+      }
+
+      // remove all <iframe> elements
+      let iframe_elements = data.html.querySelectorAll('iframe')
+      for(let i = 0; i < iframe_elements.length; i++) {
+        iframe_elements[i].remove()
+      }
+
+      // remove all JavaScript event attributes
+      let event_attributes = ['[onAbort]', '[onBlur]', '[onChange]', '[onClick]', '[onDblClick]', '[onError]', '[onFocus]', '[onKeydown]', '[onKeypress]', '[onKeyup]', '[onLoad]'
+, '[onMousedown]', '[onMousemove]', '[onMouseout]', '[onMouseover]', '[onMouseUp]', '[onReset]', '[onSelect]', '[onSubmit]', '[onUnload]']
+      let elements_with_event_attr = data.html.querySelectorAll(event_attributes.join(','))
+      for(let i = 0; i < elements_with_event_attr.length; i++) {
+        for(let j = 0; j < event_attributes.length; j++) {
+          if(typeof(elements_with_event_attr.removeAttribute) === 'function') {
+            elements_with_event_attr.removeAttribute(event_attributes[j])
+          }
+        }
+      }
+
+      /**
+      * Remove the language subdomain from the sidebar language switchers.
+      * Then append the language as a URL query param.
+      */
+      let lang_links = data.html.querySelectorAll('#p-lang .interlanguage-link a')
+      for(let i = 0; i < lang_links.length; i++) {
+        let href = lang_links[i].getAttribute('href')
+        let lang_code = href.split('wikipedia.org')[0].split('//')[1]
+        href = href.replace(lang_code, '')
+        href = `${href}?lang=${lang_code.slice(0, -1)}`
+        lang_links[i].setAttribute('href', href)
+      }
+
+      data.html = data.html.toString()
+
+      // replace upload.wikimedia.org with /media
+      const upload_wikimedia_regx = /((https:|http:|)\/\/?upload.wikimedia.org)/gm
+      data.html = data.html.replace(upload_wikimedia_regx, '/media')
+
+      // replace maps.wikimedia.org with /media/maps_wikimedia_org
+      const maps_wikimedia_regx = /((https:|http:|)\/\/?maps.wikimedia.org)/gm
+      data.html = data.html.replace(maps_wikimedia_regx, '/media/maps_wikimedia_org')
+
+      // replace wikimedia.org with /media
+      const wikimedia_regex = /((https:|http:|)\/\/?wikimedia.org)/gm
+      data.html = data.html.replace(wikimedia_regex, '/media')
+
+      // replace wiki links
+      const wiki_href_regx = /(href=\"(https:|http:|)\/\/([A-z.-]+\.)?(wikipedia.org|wikimedia.org|wikidata.org|mediawiki.org))/gm
+      data.html = data.html.replace(wiki_href_regx, 'href="')
+
+      /**
+      * If we are on DownloadAsPdf page, we have to inject a input which
+      * holds the language value. Without this input, we can't access the
+      * language (not avail from the POST data).
+      * See more on https://codeberg.org/orenom/Wikiless/issues/9
+      */
+      if(url.includes('%3ADownloadAsPdf')) {
+        let lang_input = `<input type='hidden' name='lang' value='${lang}'>`
+        let replace_str = `<input type='hidden' name='page'`
+        data.html = data.html.replace(replace_str, `${lang_input}${replace_str}`)
+      }
+
+      try {
+        if(redis.isOpen === false) {
+          await redis.connect()
+        }
+        await redis.setEx(url, config.setexs.wikipage, data.html)
+        return { success: true, html: data.html }
+      } catch(error) {
+        console.log(`Error setting the ${url} key to Redis. Error: ${error}`)
+        return { success: false, reason: 'SERVER_ERROR_REDIS_SET' }
+      }
+    }
+
+    console.log('Invalid wiki_html.')
+    return { success: false, reason: 'INVALID_HTML' }
+  }
+
+  this.proxyMedia = async (req, wiki_domain='') => {
+    let params = new URLSearchParams(req.query).toString() || ''
+
+    if(params) {
+      params = '?' + params
+    }
+
+    let path = ''
+    let domain = 'upload.wikimedia.org'
+    let wikimedia_path = ''
+
+    switch (wiki_domain) {
+      case 'maps.wikimedia.org':
+        path = req.url.split('/media/maps_wikimedia_org')[1]
+        domain = 'maps.wikimedia.org'
+        wikimedia_path = path
+        break;
+      case '/api/rest_v1/page/pdf':
+        const lang = req.query.lang || req.cookies.default_lang || config.default_lang
+        domain = `${lang}.wikipedia.org`
+        wikimedia_path = `/api/rest_v1/page/pdf/${req.params.page}`
+        path = `/api/${lang}${wiki_domain}/${req.params.page}`
+        break;
+      case 'wikimedia.org/api/rest_v1/media':
+        domain = 'wikimedia.org'
+        wikimedia_path = req.url.replace('/media/api/rest_v1', '/api/rest_v1')
+        path = req.url.split('/media/api')[1]
+        break;
+      default:
+        path = req.url.split('/media')[1]
+        wikimedia_path = path + params
+    }
+
+    url = new URL(`https://${domain}${wikimedia_path}`)
+    const file = await saveFile(url, path)
+
+    if(file.success === true) {
+      return { success: true, path: file.path }
+    }
+    return { success: false, reason: file.reason }
+  }
+
+  this.saveFile = async (url, file_path) => {
+    let media_path = ''
+    if(url.href.startsWith('https://maps.wikimedia.org/')) {
+      media_path = path.join(__dirname, '../media/maps_wikimedia_org')
+    } else if(url.href.startsWith('https://wikimedia.org/media/api/')) {
+      media_path = path.join(__dirname, '../media/api')
+    } else {
+      media_path = path.join(__dirname, '../media')
+    }
+
+    const path_with_filename = decodeURI(`${media_path}${file_path}`)
+    const path_without_filename = path.dirname(path_with_filename)
+    const options = {
+      headers: { 'User-Agent': config.wikimedia_useragent }
+    }
+
+    if(!existsSync(path_with_filename)) {
+      try {
+        await fs.mkdir(path_without_filename, { recursive: true })
+      } catch(err) {
+        return { success: false, reason: 'MKDIR_FAILED' }
+      }
+
+      let body = ''
+      try {
+        const { body: res } = await got(url, options)
+        body = res
+      } catch(err) {
+        console.log('Error while fetching data. Details:', err)
+        return { success: false, reason: 'SERVER_ERROR' }
+      }
+
+      try {
+        await fs.writeFile(path_with_filename, data, 'binary')
+        return { success: true, path: path_with_filename }
+      } catch(err) {
+        console.log('Writing media file to disk failed for unknown reason. Details:', err)
+        return { success: false, reason: 'WRITEFILE_FAILED' }
+      }
+    }
+
+    return { success: true, path: path_with_filename }
   }
 
   this.handleWikiPage = async (req, res, prefix) => {
@@ -385,22 +361,19 @@ module.exports = function(redis) {
         if(prefix) {
           let redirect_to = `${prefix}${result.url.split(prefix)[1]}`
           return res.redirect(redirect_to)
-        } else {
-          return res.redirect(`/?lang=${lang}`)
         }
+        return res.redirect(`/?lang=${lang}`)
       }
     }
 
     if(result.processed === true) {
       return res.send(applyUserMods(result.html, req.cookies.theme, lang))
-    } else {
-      let process_html = await processHtml(result, url, params, lang, req.cookies)
-      if(process_html.success === true) {
-        return res.send(applyUserMods(process_html.html.toString(), req.cookies.theme, lang))
-      } else {
-        return res.status(500).send(process_html.reason)
-      }
     }
+    const process_html = await processHtml(result, url, params, lang, req.cookies)
+    if(process_html.success === true) {
+      return res.send(applyUserMods(process_html.html.toString(), req.cookies, lang))
+    }
+    return res.status(500).send(process_html.reason)
   }
 
   this.validLang = (lang, return_langs=false) => {
@@ -456,7 +429,7 @@ module.exports = function(redis) {
     let lang_select = '<select id="default_lang" name="default_lang">'
     const valid_langs = validLang('', true)
 
-    for(var i = 0; i < valid_langs.length; i++) {
+    for(let i = 0; i < valid_langs.length; i++) {
       let selected = ''
       if(valid_langs[i] === default_lang) {
         selected = 'selected'
diff --git a/src/wikiless.js b/src/wikiless.js
index 7a5f7b2..fc7b94a 100644
--- a/src/wikiless.js
+++ b/src/wikiless.js
@@ -4,7 +4,6 @@ const path = require('path')
 const express = require('express')
 const cookieParser = require('cookie-parser')
 const fs = require('fs')
-const parser = require('node-html-parser')
 const app = express()
 const r = require('redis')
 const bodyParser = require('body-parser')
@@ -15,10 +14,6 @@ const redis = (() => {
     port: 6379
   }
 
-  if(config.redis_db) {
-    redisOptions.db = config.redis_db
-  }
-
   if(config.redis_host) {
     redisOptions.host = config.redis_host
   }
@@ -31,7 +26,13 @@ const redis = (() => {
     redisOptions.password = config.redis_password
   }
 
-  return r.createClient(redisOptions)
+  const client = r.createClient(redisOptions)
+  client.on('error', (error) => {
+    if(error) {
+      console.error(`Redis error: ${error}`)
+    }
+  })
+  return client
 })()
 
 const utils = require('./utils.js')(redis)
@@ -96,12 +97,6 @@ if(config.trust_proxy) {
 
 require('./routes')(app, utils)
 
-redis.on('error', (error) => {
-  if(error) {
-    console.error(`Redis error: ${error}`)
-  }
-})
-
 const cacheControl = require('./cache_control.js')
 cacheControl.removeCacheFiles()