diff --git a/Block/Adminhtml/Sales/Order/Tab/Info.php b/Block/Adminhtml/Sales/Order/Tab/Info.php
index f685882..561b38f 100644
--- a/Block/Adminhtml/Sales/Order/Tab/Info.php
+++ b/Block/Adminhtml/Sales/Order/Tab/Info.php
@@ -411,8 +411,7 @@ public function getFields(): array
             ];
             $fields[] = [
                 'label' => __('JSON format'),
-                'value' => '<textarea disabled="disabled">'
-                    . $this->lengowOrder->getData(LengowOrder::FIELD_EXTRA) . '</textarea>',
+                'value' => $this->lengowOrder->getData(LengowOrder::FIELD_EXTRA),
             ];
         }
         return $fields;
diff --git a/view/adminhtml/templates/sales/order/tab/info.phtml b/view/adminhtml/templates/sales/order/tab/info.phtml
index cdfe06b..460116f 100644
--- a/view/adminhtml/templates/sales/order/tab/info.phtml
+++ b/view/adminhtml/templates/sales/order/tab/info.phtml
@@ -53,7 +53,13 @@ $escaper = $block->getEscaper();
                                 <b><?= $escaper->escapeHtml($field['label']) ?></b>
                             </td>
                             <td align="right">
-                                <?= $escaper->escapeHtml($field['value']) ?>
+                                <?php if ('JSON format' === (string)$field['label']): ?>
+                                    <textarea disabled="disabled">
+                                        <?= $escaper->escapeHtml($field['value']) ?>
+                                    </textarea>
+                                <?php else: ?>
+                                    <?= $escaper->escapeHtml($field['value']) ?>
+                                <?php endif; ?>
                             </td>
                         </tr>
                     <?php endforeach; ?>