diff --git a/package.json b/package.json
index 58dc5d0..e5c3727 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "hexo-theme-butterfly",
-  "version": "3.7.5-b2",
+  "version": "3.7.5-b3",
   "description": "A Simple and Card UI Design theme for Hexo",
   "main": "package.json",
   "scripts": {
diff --git a/scripts/events/init.js b/scripts/events/init.js
index c198e9e..76f78ef 100644
--- a/scripts/events/init.js
+++ b/scripts/events/init.js
@@ -2,7 +2,7 @@ const logger = require('hexo-log')()
 
 hexo.extend.filter.register('before_generate', () => {
   // Get first two digits of the Hexo version number
-  var hexoVer = hexo.version.replace(/(^.*\..*)\..*/, '$1')
+  const hexoVer = hexo.version.replace(/(^.*\..*)\..*/, '$1')
 
   if (hexoVer < 5) {
     logger.error('Please update Hexo to V5.0.0 or higher!')
diff --git a/scripts/filters/post_lazyload.js b/scripts/filters/post_lazyload.js
index 7c02bc9..0b21de9 100644
--- a/scripts/filters/post_lazyload.js
+++ b/scripts/filters/post_lazyload.js
@@ -8,20 +8,22 @@
 
 const urlFor = require('hexo-util').url_for.bind(hexo)
 
-if (!hexo.config.theme_config.lazyload.enable) return
-
 function lazyload (htmlContent) {
   const bg = hexo.theme.config.lazyload.placeholder ? urlFor(hexo.theme.config.lazyload.placeholder) : 'data:image/gif;base64,R0lGODdhAQABAPAAAMPDwwAAACwAAAAAAQABAAACAkQBADs='
   return htmlContent.replace(/(<img.*? src=)/ig, `$1 "${bg}" data-lazy-src=`)
 }
 
-if (hexo.config.theme_config.lazyload.field === 'site') {
-  hexo.extend.filter.register('after_render:html', function (data) {
-    return lazyload.call(this, data)
-  })
-} else {
-  hexo.extend.filter.register('after_post_render', data => {
-    data.content = lazyload.call(this, data.content)
-    return data
-  })
-}
\ No newline at end of file
+hexo.extend.filter.register('after_render:html', function (data) {
+  const config = hexo.theme.config.lazyload
+  if (!config.enable) return
+  if (config.field !== 'site') return
+  return lazyload.call(this, data)
+})
+
+hexo.extend.filter.register('after_post_render', data => {
+  const config = hexo.theme.config.lazyload
+  if (!config.enable) return
+  if (config.field !== 'post') return
+  data.content = lazyload.call(this, data.content)
+  return data
+})