diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1398c18..c323495 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -53,7 +53,7 @@ jobs:
       id: deps
       run: |
         pip install -U pip setuptools wheel
-        sudo npm install -g jslint
+        sudo npm install -g prettier
         pip install -U -r requirements-test.txt
         pip install -U -e .
         pip install ${{ matrix.django-version }}
diff --git a/.jslintrc b/.jslintrc
deleted file mode 100644
index 9bb31b4..0000000
--- a/.jslintrc
+++ /dev/null
@@ -1,49 +0,0 @@
-{
-  "predef": [
-    "document",
-    "navigator",
-    "console",
-    "alert",
-    "django",
-    "window"
-  ],
-
-  "adsafe":     false,
-  "safe":       false,
-
-  "bitwise":    false,
-  "cap":        false,
-  "confusion":  true,
-  "continue":   true,
-  "css":        true,
-  "debug":      false,
-  "eqeq":       false,
-  "es5":        true,
-  "evil":       false,
-  "forin":      false,
-  "fragment":   true,
-  "newcap":     false,
-  "nomen":      false,
-  "on":         false,
-  "plusplus":   false,
-  "regexp":     true,
-  "sloppy":     false,
-  "sub":        false,
-  "undef":      false,
-  "unparam":    true,
-  "vars":       true,
-  "white":      false,
-  "validthis":  true,
-  "strict_mode":true,
-
-  "browser":    false,
-  "devel":      false,
-  "node":       false,
-  "rhino":      false,
-  "widget":     false,
-  "windows":    false,
-  "indent":     4,
-  "maxerr":     50,
-  "maxlen":     120,
-  "passfail":   false
-}
diff --git a/django_x509/static/django-x509/css/admin.css b/django_x509/static/django-x509/css/admin.css
index c679d95..864544b 100644
--- a/django_x509/static/django-x509/css/admin.css
+++ b/django_x509/static/django-x509/css/admin.css
@@ -4,19 +4,25 @@
 .field-private_key p,
 .field-private_key div.readonly,
 .field-private_key .vLargeTextField,
-pre.x509{
-    font-family: monospace;
-    white-space: pre;
+pre.x509 {
+  font-family: monospace;
+  white-space: pre;
 }
 .field-certificate .vLargeTextField,
-.field-private_key .vLargeTextField{
-    height: 350px;
+.field-private_key .vLargeTextField {
+  height: 350px;
 }
 .field-certificate p.help,
-.field-private_key p.help{
-    font-family: inherit;
-    white-space: normal;
+.field-private_key p.help {
+  font-family: inherit;
+  white-space: normal;
+}
+fieldset.x509-custom {
+  margin-top: 0;
+}
+fieldset.x509-custom .form-row {
+  padding: 0;
+}
+fieldset.x509-custom pre {
+  margin-top: 0;
 }
-fieldset.x509-custom { margin-top: 0 }
-fieldset.x509-custom .form-row{ padding: 0 }
-fieldset.x509-custom pre{ margin-top: 0 }
diff --git a/django_x509/static/django-x509/css/renew_confirmation.css b/django_x509/static/django-x509/css/renew_confirmation.css
index 1654607..adcbf18 100644
--- a/django_x509/static/django-x509/css/renew_confirmation.css
+++ b/django_x509/static/django-x509/css/renew_confirmation.css
@@ -1,23 +1,23 @@
 input[type="submit"] {
-    background: #ba2121;
-    border-radius: 4px;
-    padding: 10px 15px;
-    color: #fff;
+  background: #ba2121;
+  border-radius: 4px;
+  padding: 10px 15px;
+  color: #fff;
 }
 a.cancel-link {
-    display: inline-block;
-    vertical-align: middle;
-    height: 15px;
-    line-height: 15px;
-    background: #ddd;
-    border-radius: 4px;
-    padding: 10px 15px;
-    color: #333;
-    margin: 0 0 0 10px;
+  display: inline-block;
+  vertical-align: middle;
+  height: 15px;
+  line-height: 15px;
+  background: #ddd;
+  border-radius: 4px;
+  padding: 10px 15px;
+  color: #333;
+  margin: 0 0 0 10px;
 }
 a.cancel-link:hover {
-    background-color: #ddd;
+  background-color: #ddd;
 }
 input[type="submit"]:hover {
-    background-color: #ba2121;
+  background-color: #ba2121;
 }
diff --git a/django_x509/static/django-x509/js/x509-admin.js b/django_x509/static/django-x509/js/x509-admin.js
index a9684c9..738a1ea 100644
--- a/django_x509/static/django-x509/js/x509-admin.js
+++ b/django_x509/static/django-x509/js/x509-admin.js
@@ -1,52 +1,60 @@
 django.jQuery(function ($) {
-    'use strict';
-    // select private_key/certificate field text on click
-    $('.field-certificate, .field-private_key').find(".readonly").on('click', function () {
-        var range, selection;
-        if (window.getSelection) {
-            selection = window.getSelection();
-            range = document.createRange();
-            range.selectNodeContents(this);
-            selection.removeAllRanges();
-            selection.addRange(range);
-        } else if (document.body.createTextRange) {
-            range = document.body.createTextRange();
-            range.moveToElementText(this);
-            range.select();
-        }
+  "use strict";
+  // select private_key/certificate field text on click
+  $(".field-certificate, .field-private_key")
+    .find(".readonly")
+    .on("click", function () {
+      var range, selection;
+      if (window.getSelection) {
+        selection = window.getSelection();
+        range = document.createRange();
+        range.selectNodeContents(this);
+        selection.removeAllRanges();
+        selection.addRange(range);
+      } else if (document.body.createTextRange) {
+        range = document.body.createTextRange();
+        range.moveToElementText(this);
+        range.select();
+      }
     });
-    var changePopupPage = new RegExp(/\d\/change\/\?/);
-    var url = window.location.href;
-    var operationType = $('.field-operation_type select');
-    // enable switcher only in add forms
-    if (!operationType.length || $('form .deletelink-box').length > 0 || changePopupPage.test(url)) {
-        $('.field-operation_type').hide();
-        return;
+  var changePopupPage = new RegExp(/\d\/change\/\?/);
+  var url = window.location.href;
+  var operationType = $(".field-operation_type select");
+  // enable switcher only in add forms
+  if (
+    !operationType.length ||
+    $("form .deletelink-box").length > 0 ||
+    changePopupPage.test(url)
+  ) {
+    $(".field-operation_type").hide();
+    return;
+  }
+  // function for operation_type switcher
+  var showFields = function () {
+    // define fields for each operation
+    var importFields = $(
+        ".form-row:not(.field-certificate, .field-operation_type, " +
+          ".field-private_key, .field-name, .field-ca, .field-passphrase)",
+      ),
+      newFields = $(".form-row:not(.field-certificate, .field-private_key)"),
+      defaultFields = $(".form-row:not(.field-operation_type)"),
+      allFields = $(".form-row"),
+      value = operationType.val();
+    if (value === "-") {
+      allFields.show();
+      defaultFields.hide();
     }
-    // function for operation_type switcher
-    var showFields = function () {
-        // define fields for each operation
-        var importFields = $('.form-row:not(.field-certificate, .field-operation_type, ' +
-                          '.field-private_key, .field-name, .field-ca, .field-passphrase)'),
-            newFields = $('.form-row:not(.field-certificate, .field-private_key)'),
-            defaultFields = $('.form-row:not(.field-operation_type)'),
-            allFields = $('.form-row'),
-            value = operationType.val();
-        if (value === '-') {
-            allFields.show();
-            defaultFields.hide();
-        }
-        if (value === 'new') {
-            allFields.hide();
-            newFields.show();
-        }
-        if (value === 'import') {
-            allFields.show();
-            importFields.hide();
-        }
-    };
+    if (value === "new") {
+      allFields.hide();
+      newFields.show();
+    }
+    if (value === "import") {
+      allFields.show();
+      importFields.hide();
+    }
+  };
+  showFields();
+  operationType.on("change", function (e) {
     showFields();
-    operationType.on('change', function (e) {
-        showFields();
-    });
+  });
 });
diff --git a/run-qa-checks b/run-qa-checks
index 63d6da8..2bd1f17 100755
--- a/run-qa-checks
+++ b/run-qa-checks
@@ -2,11 +2,11 @@
 
 set -e
 
-jslint django_x509/static/django-x509/js/*.js
-
 openwisp-qa-check --migrations-to-ignore 4 \
                   --migration-path ./django_x509/migrations/ \
-                  --migration-module django_x509
+                  --migration-module django_x509 \
+                  --csslinter \
+                  --jslinter
 
 echo ''
 echo 'Running checks for SAMPLE_APP'