diff --git a/.eslintrc.yml b/.eslintrc.yml
index 1ee633c..4031bb2 100644
--- a/.eslintrc.yml
+++ b/.eslintrc.yml
@@ -28,7 +28,7 @@ rules:
   guard-for-in:           2
   handle-callback-err:    2
 
-  indent:                 [ 2, 2, { VariableDeclarator: { var: 2, let: 2, const: 3 }, SwitchCase: 1 } ]
+  indent:                 [ 2, 2, { VariableDeclarator: { var: 2, let: 2, const: 3 }, SwitchCase: 1, ignoreComments: true } ]
 
   # key-spacing:            [ 2, { "align": "value" } ]
   keyword-spacing:        2
diff --git a/lib/common/utils.js b/lib/common/utils.js
index 17dd817..33bfcc4 100644
--- a/lib/common/utils.js
+++ b/lib/common/utils.js
@@ -88,9 +88,8 @@ function replaceEntityPattern(match, name) {
 
   if (name.charCodeAt(0) === 0x23/* # */ && DIGITAL_ENTITY_TEST_RE.test(name)) {
     code = name[1].toLowerCase() === 'x' ?
-      parseInt(name.slice(2), 16)
-    :
-      parseInt(name.slice(1), 10);
+      parseInt(name.slice(2), 16) : parseInt(name.slice(1), 10);
+
     if (isValidEntityCode(code)) {
       return fromCodePoint(code);
     }
diff --git a/lib/rules_core/replacements.js b/lib/rules_core/replacements.js
index de604ed..5b5a157 100644
--- a/lib/rules_core/replacements.js
+++ b/lib/rules_core/replacements.js
@@ -62,16 +62,16 @@ function replace_rare(inlineTokens) {
     if (token.type === 'text' && !inside_autolink) {
       if (RARE_RE.test(token.content)) {
         token.content = token.content
-                    .replace(/\+-/g, '±')
-                    // .., ..., ....... -> …
-                    // but ?..... & !..... -> ?.. & !..
-                    .replace(/\.{2,}/g, '…').replace(/([?!])…/g, '$1..')
-                    .replace(/([?!]){4,}/g, '$1$1$1').replace(/,{2,}/g, ',')
-                    // em-dash
-                    .replace(/(^|[^-])---([^-]|$)/mg, '$1\u2014$2')
-                    // en-dash
-                    .replace(/(^|\s)--(\s|$)/mg, '$1\u2013$2')
-                    .replace(/(^|[^-\s])--([^-\s]|$)/mg, '$1\u2013$2');
+          .replace(/\+-/g, '±')
+          // .., ..., ....... -> …
+          // but ?..... & !..... -> ?.. & !..
+          .replace(/\.{2,}/g, '…').replace(/([?!])…/g, '$1..')
+          .replace(/([?!]){4,}/g, '$1$1$1').replace(/,{2,}/g, ',')
+          // em-dash
+          .replace(/(^|[^-])---([^-]|$)/mg, '$1\u2014$2')
+          // en-dash
+          .replace(/(^|\s)--(\s|$)/mg, '$1\u2013$2')
+          .replace(/(^|[^-\s])--([^-\s]|$)/mg, '$1\u2013$2');
       }
     }
 
diff --git a/lib/rules_inline/backticks.js b/lib/rules_inline/backticks.js
index b585c6f..3a172f1 100644
--- a/lib/rules_inline/backticks.js
+++ b/lib/rules_inline/backticks.js
@@ -29,8 +29,8 @@ module.exports = function backtick(state, silent) {
         token         = state.push('code_inline', 'code', 0);
         token.markup  = marker;
         token.content = state.src.slice(pos, matchStart)
-                                 .replace(/\n/g, ' ')
-                                 .replace(/^ (.+) $/, '$1');
+          .replace(/\n/g, ' ')
+          .replace(/^ (.+) $/, '$1');
       }
       state.pos = matchEnd;
       return true;
diff --git a/package.json b/package.json
index 05fc25b..2644af3 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "browserify": "^16.3.0",
     "chai": "^4.2.0",
     "coveralls": "^3.0.4",
-    "eslint": "^3.5.0",
+    "eslint": "^6.0.1",
     "express": "^4.14.0",
     "highlight.js": "^9.2.0",
     "istanbul": "^0.4.5",
diff --git a/support/demo_template/index.js b/support/demo_template/index.js
index 0565a5a..7c848e7 100644
--- a/support/demo_template/index.js
+++ b/support/demo_template/index.js
@@ -130,25 +130,25 @@ function mdInit() {
     mdSrc = window.markdownit('commonmark');
   } else {
     mdHtml = window.markdownit(defaults)
-                .use(require('markdown-it-abbr'))
-                .use(require('markdown-it-container'), 'warning')
-                .use(require('markdown-it-deflist'))
-                .use(require('markdown-it-emoji'))
-                .use(require('markdown-it-footnote'))
-                .use(require('markdown-it-ins'))
-                .use(require('markdown-it-mark'))
-                .use(require('markdown-it-sub'))
-                .use(require('markdown-it-sup'));
+      .use(require('markdown-it-abbr'))
+      .use(require('markdown-it-container'), 'warning')
+      .use(require('markdown-it-deflist'))
+      .use(require('markdown-it-emoji'))
+      .use(require('markdown-it-footnote'))
+      .use(require('markdown-it-ins'))
+      .use(require('markdown-it-mark'))
+      .use(require('markdown-it-sub'))
+      .use(require('markdown-it-sup'));
     mdSrc = window.markdownit(defaults)
-                .use(require('markdown-it-abbr'))
-                .use(require('markdown-it-container'), 'warning')
-                .use(require('markdown-it-deflist'))
-                .use(require('markdown-it-emoji'))
-                .use(require('markdown-it-footnote'))
-                .use(require('markdown-it-ins'))
-                .use(require('markdown-it-mark'))
-                .use(require('markdown-it-sub'))
-                .use(require('markdown-it-sup'));
+      .use(require('markdown-it-abbr'))
+      .use(require('markdown-it-container'), 'warning')
+      .use(require('markdown-it-deflist'))
+      .use(require('markdown-it-emoji'))
+      .use(require('markdown-it-footnote'))
+      .use(require('markdown-it-ins'))
+      .use(require('markdown-it-mark'))
+      .use(require('markdown-it-sub'))
+      .use(require('markdown-it-sup'));
   }
 
   // Beautify output of parser for html content
diff --git a/support/specsplit.js b/support/specsplit.js
index 038664b..c87f0b5 100755
--- a/support/specsplit.js
+++ b/support/specsplit.js
@@ -76,34 +76,34 @@ readFile(options.spec, 'utf8', function (error, input) {
   input = input.replace(/→/g, '\t');
 
   markdown.parse(input, {})
-          .filter(function (token) {
-            return token.tag === 'code' &&
-                   token.info.trim() === 'example';
-          })
-          .forEach(function (token) {
-            var arr  = token.content.split(/^\.\s*?$/m, 2);
-            var md   = arr[0];
-            var html = arr[1].replace(/^\n/, '');
-
-            var result = {
-              md:   md,
-              html: html,
-              line: token.map[0],
-              err:  ''
-            };
-
-            try {
-              if (markdown.render(md) === normalize(html)) {
-                good.push(result);
-              } else {
-                result.err = markdown.render(md);
-                bad.push(result);
-              }
-            } catch (___) {
-              // bad.push(result);
-              throw ___;
-            }
-          });
+    .filter(function (token) {
+      return token.tag === 'code' &&
+              token.info.trim() === 'example';
+    })
+    .forEach(function (token) {
+      var arr  = token.content.split(/^\.\s*?$/m, 2);
+      var md   = arr[0];
+      var html = arr[1].replace(/^\n/, '');
+
+      var result = {
+        md:   md,
+        html: html,
+        line: token.map[0],
+        err:  ''
+      };
+
+      try {
+        if (markdown.render(md) === normalize(html)) {
+          good.push(result);
+        } else {
+          result.err = markdown.render(md);
+          bad.push(result);
+        }
+      } catch (___) {
+        // bad.push(result);
+        throw ___;
+      }
+    });
 
   if (!options.type) {
     console.log(util.format('passed samples - %s, failed samples - %s', good.length, bad.length));
diff --git a/test/misc.js b/test/misc.js
index 8cf3bf5..c933afa 100644
--- a/test/misc.js
+++ b/test/misc.js
@@ -215,9 +215,9 @@ describe('Misc', function () {
 
   it('Should render link target attr', function () {
     var md = markdownit()
-                .use(require('markdown-it-for-inline'), 'target', 'link_open', function (tokens, idx) {
-                  tokens[idx].attrs.push([ 'target', '_blank' ]);
-                });
+      .use(require('markdown-it-for-inline'), 'target', 'link_open', function (tokens, idx) {
+        tokens[idx].attrs.push([ 'target', '_blank' ]);
+      });
 
     assert.strictEqual(md.render('[foo](bar)'), '<p><a href="bar" target="_blank">foo</a></p>\n');
   });