diff --git a/invoice_edit_modal.php b/invoice_edit_modal.php
index 38878590..abc451b7 100644
--- a/invoice_edit_modal.php
+++ b/invoice_edit_modal.php
@@ -67,7 +67,7 @@
                             <div class='input-group-prepend'>
                                 <span class='input-group-text'><i class='fa fa-fw fa-dollar-sign'></i></span>
                             </div>
-                            <input type='number' class='form-control' name='invoice_discount' placeholder='Discount Amount' value='<?php echo $invoice_discount; ?>'>
+                            <input type='number' class='form-control' step="0.01" name='invoice_discount' placeholder='Discount Amount' value='<?php echo $invoice_discount; ?>'>
                         </div>
                     </div>