diff --git a/invoice.php b/invoice.php
index ab1ac006..7ebdd786 100644
--- a/invoice.php
+++ b/invoice.php
@@ -247,7 +247,7 @@ if (isset($_GET['invoice_id'])) {
                 </div>
             </div>
 
-            <?php $sql_invoice_items = mysqli_query($mysqli, "SELECT * FROM invoice_items WHERE item_invoice_id = $invoice_id ORDER BY item_id ASC"); ?>
+            <?php $sql_invoice_items = mysqli_query($mysqli, "SELECT * FROM invoice_items WHERE item_invoice_id = $invoice_id ORDER BY item_order_id ASC"); ?>
 
             <div class="row mb-4">
                 <div class="col-md-12">
@@ -256,6 +256,7 @@ if (isset($_GET['invoice_id'])) {
                             <table class="table">
                                 <thead>
                                 <tr>
+                                    <th class="text-left">Sort</th>
                                     <th class="d-print-none"></th>
                                     <th>Item</th>
                                     <th>Description</th>
@@ -283,10 +284,28 @@ if (isset($_GET['invoice_id'])) {
                                     $tax_id = intval($row['item_tax_id']);
                                     $total_tax = $item_tax + $total_tax;
                                     $sub_total = $item_price * $item_quantity + $sub_total;
+                                    $item_order_id = intval($row['item_order_id']);
 
                                     ?>
 
                                     <tr>
+                                        <td>
+                                            <div class="d-print-none">
+                                                <?php if ($invoice_status !== "Paid" && $invoice_status !== "Cancelled") { ?>
+                                                <form action="post.php" method="post">
+                                                    <input type="hidden" name="invoice_id" value="<?php echo $invoice_id; ?>">
+                                                    <input type="hidden" name="item_id" value="<?php echo $item_id; ?>">
+                                                    <input type="hidden" name="item_order_id" value="<?php echo $item_order_id; ?>">
+                                                    <button class="btn btn-sm btn-light" type="submit" name="update_invoice_item_order" value="up"><i class="fa fa-fw fa-arrow-up"></i></button>
+                                                    <button class="btn btn-sm btn-light" type="submit" name="update_invoice_item_order" value="down"><i class="fa fa-fw fa-arrow-down"></i></button>
+                                                </form>
+                                                <?php } 
+                                                    echo $item_order_id;
+                                                ?>
+
+                                            </div>
+                                        </td>
+
                                         <td class="d-print-none">
                                             <?php if ($invoice_status !== "Paid" && $invoice_status !== "Cancelled") { ?>
                                                 <div class="dropdown">
@@ -323,6 +342,8 @@ if (isset($_GET['invoice_id'])) {
                                 <tr class="d-print-none" <?php if ($invoice_status == "Paid" || $invoice_status == "Cancelled") { echo "hidden"; } ?>>
                                     <form action="post.php" method="post" autocomplete="off">
                                         <input type="hidden" name="invoice_id" value="<?php echo $invoice_id; ?>">
+                                        <input type="hidden" name="item_order_id" value="<?php echo mysqli_num_rows($sql_invoice_items) + 1; ?>">
+                                        <td></td>
                                         <td></td>
                                         <td>
                                             <input type="text" class="form-control" id="name" name="name" placeholder="Item" required>