diff --git a/lib/db/getSiteData.js b/lib/db/getSiteData.js
index 6d9c2c66..1877dedb 100755
--- a/lib/db/getSiteData.js
+++ b/lib/db/getSiteData.js
@@ -245,7 +245,7 @@ async function convertNotionToSiteDate(pageId, from, pageRecordMap) {
   })
 
   // Sort by date
-  if (siteConfig('POSTS_SORT_BY', '', NOTION_CONFIG) === 'date') {
+  if (siteConfig('POSTS_SORT_BY', null, NOTION_CONFIG) === 'date') {
     allPages.sort((a, b) => {
       return b?.publishDate - a?.publishDate
     })