diff --git a/lightrag_webui/src/lib/constants.ts b/lightrag_webui/src/lib/constants.ts
index 488db2e8..1644450a 100644
--- a/lightrag_webui/src/lib/constants.ts
+++ b/lightrag_webui/src/lib/constants.ts
@@ -31,10 +31,6 @@ export const supportedFileTypes = {
   'text/plain': [
     '.txt',
     '.md',
-    '.pdf',
-    '.docx',
-    '.pptx',
-    '.xlsx',
     '.rtf',  //# Rich Text Format
     '.odt', // # OpenDocument Text
     '.tex', // # LaTeX
@@ -69,8 +65,10 @@ export const supportedFileTypes = {
   ],
   'application/pdf': ['.pdf'],
   'application/msword': ['.doc'],
+  'application/vnd.ms-excel': ['.xls'],
   'application/vnd.openxmlformats-officedocument.wordprocessingml.document': ['.docx'],
-  'application/vnd.openxmlformats-officedocument.presentationml.presentation': ['.pptx']
+  'application/vnd.openxmlformats-officedocument.presentationml.presentation': ['.pptx'],
+  'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet': ['.xlsx']
 }
 
 export const SiteInfo = {