diff --git a/src/pages/Proof/Reply_Public/ProofForm.js b/src/pages/Proof/Reply_Public/ProofForm.js
index a994122c..cc25d27a 100644
--- a/src/pages/Proof/Reply_Public/ProofForm.js
+++ b/src/pages/Proof/Reply_Public/ProofForm.js
@@ -185,12 +185,25 @@ const FormPanel = ({ formData }) => {
         }
     });
 
+    const getFileExtension = (fileName) => {
+        const name = (fileName || "").toLowerCase();
+        const dot = name.lastIndexOf(".");
+        if (dot <= 0 || dot === name.length - 1) {
+            return "";
+        }
+        return name.substring(dot + 1);
+    }
+
+    const isAcceptedProofReplyFile = (fileName) => {
+        return ["pdf", "jpg", "jpeg", "png"].includes(getFileExtension(fileName));
+    }
+
     const readFile = (event) => {
         let file = event.target.files[0];
         if (file) {
-            if (!file.name.toLowerCase().substr(file.name.length - 4).includes(".pdf")) {
+            if (!isAcceptedProofReplyFile(file.name)) {
                 setWarningTitle(intl.formatMessage({ id: "attention" }))
-                setWarningText(intl.formatMessage({ id: 'requireValidFileWithPdfFormat' }));
+                setWarningText(intl.formatMessage({ id: 'requireValidFileWithProofReplyFormat' }));
                 setIsWarningPopUp(true);
                 document.getElementById("uploadFileBtn").value = "";
                 return;
@@ -630,6 +643,11 @@ const FormPanel = ({ formData }) => {
                                                                         <FormattedMessage id="requiredUploadFix" />：
                                                                     </Typography>
                                                                 </Grid>
+                                                                <Grid item xs={12} md={12} textAlign="left">
+                                                                    <Typography variant="subtitle1" component="span" sx={{ color: 'primary.primary' }}>
+                                                                        <FormattedMessage id="acceptProofReplyFileFormats" />
+                                                                    </Typography>
+                                                                </Grid>
 
                                                                 <Grid item xs={12} md={12} textAlign="left">
                                                                     <ThemeProvider theme={PNSPS_BUTTON_THEME}>
@@ -660,7 +678,7 @@ const FormPanel = ({ formData }) => {
                                                                         id="uploadFileBtn"
                                                                         name="file"
                                                                         type="file"
-                                                                        accept=".pdf"
+                                                                        accept=".pdf,.jpg,.jpeg,.png,application/pdf,image/jpeg,image/png"
                                                                         style={{ display: 'none' }}
                                                                         disabled={attachments.length >= (formik.values.groupType === "Private Bill" ? 2 : 1)}
                                                                         onChange={(event) => {
diff --git a/src/translations/en.json b/src/translations/en.json
index a44baa48..edb8a832 100644
--- a/src/translations/en.json
+++ b/src/translations/en.json
@@ -44,6 +44,8 @@
   "requireFile": "Please select a file to upload",
   "requireValidFile": "Please upload a valid file",
   "requireValidFileWithPdfFormat": "Please upload a valid file (file format: .pdf)",
+  "requireValidFileWithProofReplyFormat": "Please upload a valid file (file format: .pdf, .jpg, .jpeg, .png)",
+  "acceptProofReplyFileFormats": "Accept file formats: pdf, jpg, jpeg and png.",
   "requireValidFileWithFormat": "Please upload a valid file (file format: .doc, .docx, .xls, .xlsx)",
   "submissionSuccess": "Application submitted successfully",
   "noMoreThen40Words": "Must not exceed 40 characters",
diff --git a/src/translations/zh-CN.json b/src/translations/zh-CN.json
index 8ad9d772..76f3ac2f 100644
--- a/src/translations/zh-CN.json
+++ b/src/translations/zh-CN.json
@@ -44,6 +44,8 @@
   "requireFile": "请选择上传档案",
   "requireValidFile": "请上传有效档案",
   "requireValidFileWithPdfFormat": "请上传有效档案 (档案格式: .pdf)",
+  "requireValidFileWithProofReplyFormat": "请上传有效档案 (档案格式: .pdf, .jpg, .jpeg, .png)",
+  "acceptProofReplyFileFormats": "接受档案格式：pdf、jpg、jpeg 及 png。",
   "requireValidFileWithFormat": "请上传有效档案 (档案格式: .doc, .docx, .xls, .xlsx)",
   "submissionSuccess": "申请提交成功",
   "noMoreThen40Words": "不得超过 40 个字符",
diff --git a/src/translations/zh-HK.json b/src/translations/zh-HK.json
index 71998691..11c20259 100644
--- a/src/translations/zh-HK.json
+++ b/src/translations/zh-HK.json
@@ -44,6 +44,8 @@
   "requireFile": "請選擇上傳檔案",
   "requireValidFile": "請上傳有效檔案",
   "requireValidFileWithPdfFormat": "請上傳有效檔案 (檔案格式: .pdf)",
+  "requireValidFileWithProofReplyFormat": "請上傳有效檔案 (檔案格式: .pdf, .jpg, .jpeg, .png)",
+  "acceptProofReplyFileFormats": "接受檔案格式：pdf、jpg、jpeg 及 png。",
   "requireValidFileWithFormat": "請上傳有效檔案 (檔案格式: .doc, .docx, .xls, .xlsx)",
   "submissionSuccess": "申請提交成功",
   "noMoreThen40Words": "不得超過 40 個字符",