diff --git a/themes/chameleon/scripts/feed/.atom.xml b/themes/chameleon/scripts/feed/.atom.xml
index 17480f8..b78d9e5 100644
--- a/themes/chameleon/scripts/feed/.atom.xml
+++ b/themes/chameleon/scripts/feed/.atom.xml
@@ -1,29 +1,29 @@
 <?xml version="1.0" encoding="utf-8"?>
-<feed xmlns="http://www.w3.org/2005/Atom">
+<feed xmlns="https://www.w3.org/2005/Atom">
   <title>{{ config.title }}</title>
   {% if icon %}<icon>{{ icon }}</icon>{% endif %}
   {% if config.subtitle %}<subtitle>{{ config.subtitle }}</subtitle>{% endif %}
   <link href="{{ feed_url | uriencode }}" rel="self"/>
   {% if config.feed.hub %}<link href="{{ config.feed.hub | uriencode }}" rel="hub"/>{% endif %}
-  <link href="{{ url }}"/>
-  <updated>{{ posts.first().date | date }}</updated>
-  <id>{{ url }}</id>
+  <link href="{{ url | uriencode }}"/>
+  <updated>{{ posts.first().updated.toISOString() }}</updated>
+  <id>{{ url | uriencode }}</id>
   {% if config.author %}
   <author>
     <name>{{ config.author }}</name>
     {% if config.email %}<email>{{ config.email }}</email>{% endif %}
   </author>
   {% endif %}
-  <generator uri="http://hexo.io/">Hexo</generator>
+  <generator uri="https://hexo.io/">Hexo</generator>
   {% for post in posts.toArray() %}
   <entry>
     <title>{{ post.title }}</title>
-    <link href="{{ url }}{{ post.path | uriencode }}"/>
-    <id>{{ url }}{{ post.path }}</id>
-    <published>{{ post.date | date }}</published>
+    <link href="{{ post.permalink }}"/>
+    <id>{{ post.permalink }}</id>
+    <published>{{ post.date.toISOString() }}</published>
     <updated>{% if post.lastUpdated %}{{ post.lastUpdated | date }}{% else %}{{ post.date | date }}{% endif %}</updated>
     {% if config.feed.content and post.content %}
-    <content type="html"><![CDATA[{{ post.more | noControlChars | safe }}]]></content>
+    <content type="html"><![CDATA[{{ post.content | noControlChars | safe }}]]></content>
     {% endif %}
     <summary type="html">
     {% if post.description %}
@@ -47,13 +47,10 @@
     {% endif %}
     </summary>
     {% if post.image %}
-    <content src="{{ url }}{{ post.image | uriencode }}" type="image" />
+    <content src="{{ url + post.image | uriencode }}" type="image" />
     {% endif %}
-    {% for category in post.categories.toArray() %}
-      <category term="{{ category.name }}" scheme="{{ url }}{{ category.path | uriencode }}"/>
-    {% endfor %}
     {% for tag in post.tags.toArray() %}
-      <category term="{{ tag.name }}" scheme="{{ url }}{{ tag.path | uriencode }}"/>
+      <category term="{{ tag.name }}" scheme="{{ url + tag.path | uriencode }}"/>
     {% endfor %}
   </entry>
   {% endfor %}
diff --git a/themes/chameleon/scripts/feed/generator.js b/themes/chameleon/scripts/feed/generator.js
index 81af888..cf73997 100644
--- a/themes/chameleon/scripts/feed/generator.js
+++ b/themes/chameleon/scripts/feed/generator.js
@@ -2,8 +2,8 @@
 
 const nunjucks = require('nunjucks')
 const env = new nunjucks.Environment()
-const pathFn = require('path')
-const fs = require('fs')
+const { join } = require('path')
+const { readFileSync } = require('fs')
 const moment = require('moment')
 
 env.addFilter('uriencode', str => {
@@ -18,8 +18,8 @@ env.addFilter('date', str => {
   return moment(str).format('YYYY-MM-DD[T00:00:00.000Z]')
 })
 
-const atomTmplSrc = pathFn.join(__dirname, './.atom.xml')
-const atomTmpl = nunjucks.compile(fs.readFileSync(atomTmplSrc, 'utf8'), env)
+const atomTmplSrc = join(__dirname, './.atom.xml')
+const atomTmpl = nunjucks.compile(readFileSync(atomTmplSrc, 'utf8'), env)
 
 module.exports = function (locals) {
   const config = this.config
diff --git a/themes/chameleon/scripts/feed/index.js b/themes/chameleon/scripts/feed/index.js
index 4db03cf..4c72551 100644
--- a/themes/chameleon/scripts/feed/index.js
+++ b/themes/chameleon/scripts/feed/index.js
@@ -7,7 +7,7 @@
 * to use post.lastUpdated and remove timezone
 */
 
-const pathFn = require('path')
+const { extname } = require('path')
 
 const config = hexo.config.feed = Object.assign({
   type: 'atom',
@@ -25,7 +25,7 @@ if (!config.path) {
 }
 
 // Add extension name if don't have
-if (!pathFn.extname(config.path)) {
+if (!extname(config.path)) {
   config.path += '.xml'
 }