diff --git a/static/main.js b/static/main.js
index 62ccf4e..e2b029c 100644
--- a/static/main.js
+++ b/static/main.js
@@ -45,8 +45,8 @@
     var paper_id = $("#paper_id");
     if ($('#author').is(":checked")) {
         paper_id.removeAttr('disabled');
-        paper_id.attr('placeholder', '0000');
-        paper_id.attr('pattern', '\\d{4}');
+        paper_id.attr('placeholder', '0');
+        paper_id.attr('pattern', '\\d{1,4}');
         paper_id.attr('required', 'required');
         //if (paper_id.attr('oldval').match(/^\\d{4}$/)) {
         //    paper_id.val(paper_id.attr('oldval'));
diff --git a/templates/register.htm b/templates/register.htm
index 60ff1ba..7988b2e 100644
--- a/templates/register.htm
+++ b/templates/register.htm
@@ -451,10 +451,10 @@
 
     <div class="form-outline col-md-5">
         <label class="form-label fw-bold" for="paper_id">Paper ID</label>
-        <input type="text" class="form-control fs-4" name="accepted_paper_id" id="paper_id" <?php echo isset($_POST[ 'author']) ? 'placeholder="0000"' : 'disabled' ?> value="
+        <input type="text" class="form-control fs-4" name="accepted_paper_id" id="paper_id" <?php echo isset($_POST[ 'author']) ? 'placeholder="0"' : 'disabled' ?> value="
         <?php echo isset($_POST['paper_id']) ? htmlspecialchars($_POST['paper_id']) : '' ?>" />
         <div class="invalid-feedback">
-            Please provide the 4 digits ID of your accepted paper.
+            Please provide the ID number of your accepted paper.
         </div>
     </div>