diff --git a/package.json b/package.json
index edd6bd6..6b7b5e8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "hexo-theme-butterfly",
-  "version": "3.8.3",
+  "version": "3.8.4",
   "description": "A Simple and Card UI Design theme for Hexo",
   "main": "package.json",
   "scripts": {
@@ -20,7 +20,7 @@
   },
   "bugs": {
     "url": "https://github.com/jerryc127/hexo-theme-butterfly/issues",
-    "email": "btf@immyw.com"
+    "email": "i@immyw.com"
   },
   "dependencies": {
     "hexo-renderer-stylus": "^2.0.1",
diff --git a/scripts/helpers/related_post.js b/scripts/helpers/related_post.js
index 1e7efd4..2f8371a 100644
--- a/scripts/helpers/related_post.js
+++ b/scripts/helpers/related_post.js
@@ -46,11 +46,7 @@ hexo.extend.helper.register('related_posts', function (currentPost, allPosts) {
 
   if (relatedPosts.length > 0) {
     result += '<div class="relatedPosts">'
-    result +=
-      '<div class="headline"><i class="fas fa-thumbs-up fa-fw"></i><span>' +
-      ' ' +
-      headlineLang +
-      '</span></div>'
+    result += `<div class="headline"><i class="fas fa-thumbs-up fa-fw"></i><span>${headlineLang}</span></div>`
     result += '<div class="relatedPosts-list">'
 
     for (let i = 0; i < Math.min(relatedPosts.length, limitNum); i++) {
@@ -58,32 +54,14 @@ hexo.extend.helper.register('related_posts', function (currentPost, allPosts) {
         relatedPosts[i].cover === false
           ? relatedPosts[i].randomcover
           : relatedPosts[i].cover
-      result +=
-        '<div><a href="' +
-        hexoConfig.root +
-        relatedPosts[i].path +
-        '" title="' +
-        relatedPosts[i].title +
-        '">'
-      result +=
-        '<img class="cover" src="' +
-        this.url_for(cover) +
-        '" alt="cover">'
+      result += `<div><a href="${this.url_for(relatedPosts[i].path)}" title="${relatedPosts[i].title}">`
+      result += `<img class="cover" src="${this.url_for(cover)}" alt="cover">`
       if (dateType === 'created') {
-        result +=
-          '<div class="content is-center"><div class="date"><i class="far fa-calendar-alt fa-fw"></i>' +
-          ' ' +
-          this.date(relatedPosts[i].created, hexoConfig.date_format) +
-          '</div>'
+        result += `<div class="content is-center"><div class="date"><i class="far fa-calendar-alt fa-fw"></i> ${this.date(relatedPosts[i].created, hexoConfig.date_format)}</div>`
       } else {
-        result +=
-          '<div class="content is-center"><div class="date"><i class="fas fa-history fa-fw"></i>' +
-          ' ' +
-          this.date(relatedPosts[i].updated, hexoConfig.date_format) +
-          '</div>'
+        result += `<div class="content is-center"><div class="date"><i class="fas fa-history fa-fw"></i> ${this.date(relatedPosts[i].updated, hexoConfig.date_format)}</div>`
       }
-      result +=
-        '<div class="title">' + relatedPosts[i].title + '</div>'
+      result += `<div class="title">${relatedPosts[i].title}</div>`
       result += '</div></a></div>'
     }
 
diff --git a/source/css/_highlight/theme.styl b/source/css/_highlight/theme.styl
index 528f18e..58fc330 100644
--- a/source/css/_highlight/theme.styl
+++ b/source/css/_highlight/theme.styl
@@ -11,7 +11,7 @@ if $highlight_theme == 'darker' || ($highlight_theme == 'mac')
     color: alpha($highlight-foreground, .8),
     bg-color: darken($highlight-background, 2)
   }
-  $highlight-scrollbar = darken($highlight-background, 6)
+  $highlight-scrollbar = lighten($highlight-background, 8)
 
   if $highlighEnable
     $highlight-comment = #969896
@@ -37,7 +37,7 @@ if $highlight_theme == 'pale night'
     color: $highlight-foreground,
     bg-color: darken($highlight-background, 2)
   }
-  $highlight-scrollbar = darken($highlight-background, 6)
+  $highlight-scrollbar = lighten($highlight-background, 8)
 
   if $highlighEnable
     $highlight-comment = #676E95
@@ -63,7 +63,7 @@ if $highlight_theme == 'ocean'
     color: $highlight-foreground,
     bg-color: darken($highlight-background, 2)
   }
-  $highlight-scrollbar = darken($highlight-background, 5)
+  $highlight-scrollbar = lighten($highlight-background, 8)
 
   if $highlighEnable
     $highlight-comment = rgba(101, 115, 126, .8)
diff --git a/source/js/main.js b/source/js/main.js
index 4bf8839..41a21e4 100644
--- a/source/js/main.js
+++ b/source/js/main.js
@@ -225,10 +225,11 @@ document.addEventListener('DOMContentLoaded', function () {
   function addPhotoFigcaption () {
     document.querySelectorAll('#article-container img').forEach(function (item) {
       const parentEle = item.parentNode
-      if (!parentEle.parentNode.classList.contains('justified-gallery')) {
+      const altValue = item.alt
+      if (altValue && !parentEle.parentNode.classList.contains('justified-gallery')) {
         const ele = document.createElement('div')
         ele.className = 'img-alt is-center'
-        ele.textContent = item.getAttribute('alt')
+        ele.textContent = altValue
         parentEle.insertBefore(ele, item.nextSibling)
       }
     })
diff --git a/source/js/search/local-search.js b/source/js/search/local-search.js
index 1abc7cf..5b13445 100644
--- a/source/js/search/local-search.js
+++ b/source/js/search/local-search.js
@@ -47,9 +47,10 @@ window.addEventListener('load', () => {
       .then(str => new window.DOMParser().parseFromString(str, 'text/xml'))
       .then(data => {
         const datas = [...data.querySelectorAll('entry')].map(function (item) {
+          const content = item.querySelector('content')
           return {
             title: item.querySelector('title').textContent,
-            content: item.querySelector('content').textContent,
+            content: content ? content.textContent : '',
             url: item.querySelector('url').textContent
           }
         })