diff --git a/src/pages/PublicNotice/ApplyForm/PublicNoticeApplyForm.js b/src/pages/PublicNotice/ApplyForm/PublicNoticeApplyForm.js
index fbdc562..c9f8aac 100644
--- a/src/pages/PublicNotice/ApplyForm/PublicNoticeApplyForm.js
+++ b/src/pages/PublicNotice/ApplyForm/PublicNoticeApplyForm.js
@@ -94,15 +94,17 @@ const PublicNoticeApplyForm = ({loadedData, selections}) => {
     const readFile=(event)=>{
         let file = event.target.files[0];
         if(file){
-            if(file.type == "application/vnd.openxmlformats-officedocument.wordprocessingml.documen"
-            || file.type == "application/msword"
-            || file.type == "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
-            || file.type == "application/vnd.ms-excel"
+            if(file.name.substr(file.name.length - 4).includes(".doc")
+            || file.name.substr(file.name.length - 5).includes(".docx")
+            || file.name.substr(file.name.length - 4).includes(".xls")
+            || file.name.substr(file.name.length - 5).includes(".xlsx")
             ){
                 setAttachment(event.target.files[0]);
             }else{
                 setWarningText("請上傳有效檔案 (檔案格式: .doc, .docx, .xls, .xlsx)");
                 setIsWarningPopUp(true);
+                setAttachment({});
+                document.getElementById("uploadFileBtn").value = "";
                 return;
             }
         }