diff --git a/layout/includes/mixins/post-ui.pug b/layout/includes/mixins/post-ui.pug
index c28740d..d2cb014 100644
--- a/layout/includes/mixins/post-ui.pug
+++ b/layout/includes/mixins/post-ui.pug
@@ -22,14 +22,14 @@ mixin postUI(posts)
             span.article-meta
               i.fas.fa-thumbtack.sticky
               span.sticky= _p('sticky')
-              span.article-meta__separator |
+              span.article-meta-separator |
           if (theme.post_meta.page.date_type)
             span.post-meta-date
               if (theme.post_meta.page.date_type === 'both')
                 i.far.fa-calendar-alt
                 span.article-meta-label=_p('post.created')
                 time.post-meta-date-created(datetime=date_xml(article.date) title=_p('post.created') + ' ' + full_date(article.date))=date(article.date, config.date_format)
-                span.article-meta__separator |
+                span.article-meta-separator |
                 i.fas.fa-history
                 span.article-meta-label=_p('post.updated')
                 time.post-meta-date-updated(datetime=date_xml(article.updated) title=_p('post.updated') + ' ' + full_date(article.updated))=date(article.updated, config.date_format)
diff --git a/package.json b/package.json
index 7e5536e..e37181a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "hexo-theme-butterfly",
-  "version": "4.0.0-b10",
+  "version": "4.0.0-b11",
   "description": "A Simple and Card UI Design theme for Hexo",
   "main": "package.json",
   "scripts": {
diff --git a/scripts/events/config.js b/scripts/events/config.js
index 8d4d074..bd6e05a 100644
--- a/scripts/events/config.js
+++ b/scripts/events/config.js
@@ -115,6 +115,8 @@ hexo.extend.filter.register('before_generate', () => {
 
   let { use } = themeConfig.comments
 
+  if (!use) return
+
   if (typeof use === 'string') {
     use = use.split(',')
   }